What Is The Henry’S Law Constant For Co2 At 20∘C?

What Is The Henry
Question: – At 20 degrees Celsius, Henry’s law constant for carbon dioxide (CO_2) in water is 3.4 \times 10^ M/atm, and the partial pressure of CO_2 is 3.9 \times 10^ atm.a. Calculate the solubility (in moles/liter) of CO_2 in water.b. Calculate the mass of CO_2 in grams dissolved in an outdoor swimming pool whose volume is 100,000 liters and whose temperature is 20 degrees Celsius.

What is Henry’s constant for CO2?

Carbon dioxide (CO 2 ) : 29.4 L·atm/mol. hydrogen (H 2 ) : 1282.1 L·atm/mol.

What is the Henry’s law constant for CO2 at 25 degrees C?

The Henry’s law constant for CO2 in water at 25 °C is 3.1×10^-2 M atm-1.

What is the solubility of CO2 in water at 20 C?

At 20 C and 1 atm, the solubility of CO2 in water is 0.169 g/100 g of H2O.

Does Henry’s law apply to CO2?

We can use Henry’s Law to calculate the concentration of dissolved carbon dioxide in an aqueous solution. The current, average concentration of CO2 is 387 ppm, that is 387 x 10-6 atm. Carbon dioxide reacts with water.

How do you find Henry’s law constant?

Example 2 – The value of k H for carbon dioxide at a temperature of 293 K is 1.6*10 3 atm.L.mol -1, At what partial pressure would the gas have a solubility (in water) of 2*10 -5 M? Substituting the given values k H = 1.6*10 3 atm.L.mol -1 and C = 2*10 -5 M into the Henry’s law formula: P = k H *C = (1.6*10 3 atm.L.mol -1 ) * (2*10 -5 mol.L -1 ) = 0.032 atm.

Gases such as NH 3 and CO 2 do not obey Henry’s law. This is due to the fact that these gases react with water. NH 3 +H 2 O → NH 4 + + OH – CO 2 + H 2 O → H 2 CO 3 They have higher solubilities than expected by Henry’s law due to reactions of gases such as NH 3, and CO 2 (g).

Henry’s law is only applicable when the molecules are in equilibrium. Henry’s law does not apply to gases at high pressures (for example, N 2 (g) at high pressure becomes very soluble and dangerous when introduced into the blood supply). It’s important to remember that Henry’s law constants are highly temperature-dependent because vapour pressure and solubility are both temperature-dependent.

The law is only valid when the molecules in the system are in equilibrium. When the gases are under extremely high pressure, Henry’s Law does not apply. This law also does not apply when the solution and gas are involved in a chemical reaction with each other.

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View Quiz Answers and Analysis : Henry’s Law – Statement, Formula, Constant, Solved Examples

How do you get Henry’s constant?

Other Forms of Henry’s Law – The formula for Henry’s law may be written other ways to allow for easy calculations using different units, particularly of K H, Here are some common constants for gases in water at 298 K and the applicable forms of Henry’s law:

Equation K H = P/C K H = C/P K H = P/x K H = C aq / C gas
units dimensionless
O 2 769.23 1.3 E-3 4.259 E4 3.180 E-2
H 2 1282.05 7.8 E-4 7.088 E4 1.907 E-2
CO 2 29.41 3.4 E-2 0.163 E4 0.8317
N 2 1639.34 6.1 E-4 9.077 E4 1.492 E-2
He 2702.7 3.7 E-4 14.97 E4 9.051 E-3
Ne 2222.22 4.5 E-4 12.30 E4 1.101 E-2
Ar 714.28 1.4 E-3 3.9555 E4 3.425 E-2
CO 1052.63 9.5 E-4 5.828 E4 2.324 E-2


L soln is liters of solution. c aq is moles of gas per liter of solution. P is partial pressure of the gas above the solution, typically in atmosphere absolute pressure. x aq is mole fraction of the gas in solution, which is approximately equal to the moles of gas per moles of water. atm refers to atmospheres of absolute pressure.

What is the Henry’s law constant for CO2 in mol /( L ⋅ ATM?

Question: – The Henry’s law constant for CO _2 is 3.1 \times 10 ^ mol/L-atm at 25 degrees C. What pressure would be necessary in order to have a 0.25 M solution?

What is Henry’s law constant for CO2 in water?

Henry’s law constant for CO 2 in water is 1.67 × 10 8 Pa at 298 K.

When a gas is heated from 20 C to 40 C at constant pressure the volume?

When gases are heated from 20 degree celsius to 40 degree celsius at constant pressure, the volumes. Increase by the same magnitude.

What state is carbon dioxide at 20 degrees Celsius?

Carbon dioxide

/td> Names Other names

  • Carbonic acid gas
  • Carbonic anhydride
  • Carbonic dioxide
  • Carbon(IV) oxide
  • R-744 ( refrigerant )
  • R744 (refrigerant alternative spelling)
  • Dry ice (solid phase)
Identifiers CAS Number


3D model ( JSmol )
  • Interactive image
  • Interactive image


Beilstein Reference 1900390 ChEBI






ECHA InfoCard 100.004.271 EC Number


E number E290 (preservatives) Gmelin Reference 989 KEGG


MeSH Carbon+dioxide PubChem CID


RTECS number




UN number 1013 (gas), 1845 (solid) CompTox Dashboard ( EPA )


show InChI show SMILES Properties Chemical formula C O 2 Molar mass 44.009 g·mol −1 Appearance Colorless gas Odor
  • Low concentrations: none
  • High concentrations: sharp; acidic
  • 1562 kg/m 3 (solid at 1 atm (100 kPa) and −78.5 °C (−109.3 °F))
  • 1101 kg/m 3 (liquid at saturation −37 °C (−35 °F))
  • 1.977 kg/m 3 (gas at 1 atm (100 kPa) and 0 °C (32 °F))
Critical point ( T, P ) 304.128(15) K ( 30.978(15) °C ), 7.3773(30) MPa ( 72.808(30) atm ) Sublimation conditions 194.6855(30) K ( −78.4645(30) °C ) at 1 atm ( 0.101 325 MPa ) Solubility in water 1.45 g/L at 25 °C (77 °F), 100 kPa (0.99 atm) Vapor pressure 5.7292(30) MPa, 56.54(30) atm ( 20 °C ( 293.15 K )) Acidity (p K a ) 6.35, 10.33 Magnetic susceptibility (χ) −20.5·10 −6 cm 3 /mol Thermal conductivity 0.01662 W·m −1 ·K −1 (300 K (27 °C; 80 °F)) Refractive index ( n D ) 1.00045 Viscosity
  • 14.90 μPa·s at 25 °C (298 K)
  • 70 μPa·s at −78.5 °C (194.7 K)
Dipole moment 0 D Structure Crystal structure Trigonal Molecular shape Linear Thermochemistry Heat capacity ( C ) 37.135 J/K·mol Std molar entropy ( S ⦵ 298 ) 214 J·mol −1 ·K −1 Std enthalpy of formation (Δ f H ⦵ 298 ) −393.5 kJ·mol −1 Pharmacology ATC code V03AN02 ( WHO ) Hazards NFPA 704 (fire diamond) 2 0 0 SA Lethal dose or concentration (LD, LC): LC Lo ( lowest published ) 90,000 ppm (human, 5 min) NIOSH (US health exposure limits): PEL (Permissible) TWA 5000 ppm (9000 mg/m 3 ) REL (Recommended) TWA 5000 ppm (9000 mg/m 3 ), ST 30,000 ppm (54,000 mg/m 3 ) IDLH (Immediate danger) 40,000 ppm Safety data sheet (SDS) Sigma-Aldrich Related compounds Other anions
  • Carbon disulfide
  • Carbon diselenide
  • Carbon ditelluride
Other cations
  • Silicon dioxide
  • Germanium dioxide
  • Tin dioxide
  • Lead dioxide
Related carbon oxides
  • Carbon monoxide
  • Carbon suboxide
  • Dicarbon monoxide
  • Carbon trioxide
Related compounds
  • Carbonic acid
  • Carbonyl sulfide
Supplementary data page Carbon dioxide (data page) Except where otherwise noted, data are given for materials in their standard state (at 25 °C, 100 kPa). verify ( what is ?) Infobox references

Carbon dioxide ( chemical formula CO 2 ) is a chemical compound made up of molecules that each have one carbon atom covalently double bonded to two oxygen atoms. It is found in the gas state at room temperature. In the air, carbon dioxide is transparent to visible light but absorbs infrared radiation, acting as a greenhouse gas,

  1. It is a trace gas in Earth’s atmosphere at 421 parts per million (ppm), or about 0.04% by volume (as of May 2022), having risen from pre-industrial levels of 280 ppm.
  2. Burning fossil fuels is the primary cause of these increased CO 2 concentrations and also the primary cause of climate change,
  3. Carbon dioxide is soluble in water and is found in groundwater, lakes, ice caps, and seawater,

When carbon dioxide dissolves in water, it forms carbonic acid (H 2 CO 3 ), which causes ocean acidification as atmospheric CO 2 levels increase. As the source of available carbon in the carbon cycle, atmospheric CO 2 is the primary carbon source for life on Earth.

Its concentration in Earth’s pre-industrial atmosphere since late in the Precambrian has been regulated by organisms and geological phenomena. Plants, algae and cyanobacteria use energy from sunlight to synthesize carbohydrates from carbon dioxide and water in a process called photosynthesis, which produces oxygen as a waste product.

In turn, oxygen is consumed and CO 2 is released as waste by all aerobic organisms when they metabolize organic compounds to produce energy by respiration, CO 2 is released from organic materials when they decay or combust, such as in forest fires. Since plants require CO 2 for photosynthesis, and humans and animals depend on plants for food, CO 2 is necessary for the survival of life on earth.

Carbon dioxide is 53% more dense than dry air, but is long lived and thoroughly mixes in the atmosphere. About half of excess CO 2 emissions to the atmosphere are absorbed by land and ocean carbon sinks, These sinks can become saturated and are volatile, as decay and wildfires result in the CO 2 being released back into the atmosphere.

CO 2 is eventually sequestered (stored for the long term) in rocks and organic deposits like coal, petroleum and natural gas, Sequestered CO 2 is released into the atmosphere through burning fossil fuels or naturally by volcanoes, hot springs, geysers, and when carbonate rocks dissolve in water or react with acids.

CO 2 is a versatile industrial material, used, for example, as an inert gas in welding and fire extinguishers, as a pressurizing gas in air guns and oil recovery, and as a supercritical fluid solvent in decaffeination of coffee and supercritical drying, It is also a feedstock for the synthesis of fuels and chemicals.

It is an unwanted byproduct in many large scale oxidation processes, for example, in the production of acrylic acid (over 5 million tons/year). The frozen solid form of CO 2, known as dry ice, is used as a refrigerant and as an abrasive in dry-ice blasting,

What phase is carbon dioxide in at 20 degrees Celsius?

Carbon dioxide is a gas at room temperature. The sublimation point of carbon dioxide (dry ice) is #-78.5^@C#, Carbon dioxide is a gas at room temperature. The sublimation point of carbon dioxide (dry ice) is #-78.5^@C#, Not that #CO_2# does not turn to liquid when it is cooled down, it turns to solid state instead, this is due to the type of intermolecular forces between the #CO_2# molecules which are London dispersion forces (or Van der Waals forces). here is a picture of a dry ice turning into gas at room temperature:

What is the water density at 20 C?

UKAS ISO/IEC17025 and ISO Guide 34 certified, density: 0.9982 g/mL at 20 °C, density: 0.9970 g/mL at 25 °C.

What is the concentration of CO2 in air?

Also known as: Carbonic acid gas; Dry Ice; CO2; Diesel Exhaust Component Chemical reference number (CAS): 124-38-9 CO2 is the fourth most abundant gas in the earth’s atmosphere. At room temperature, carbon dioxide (CO2) is a colorless, odorless, non-flammable gas, at other temperatures and pressures, carbon dioxide can be a liquid or a solid.

  1. Solid carbon dioxide is called dry ice because it slowly changes from a cold solid directly into a gas.
  2. Carbon dioxide is a byproduct of normal cell function when it is breathed out of the body.
  3. CO2 is also produced when fossil fuels are burned or decaying vegetation.
  4. Surface soils can sometimes contain high concentrations of this gas, from decaying vegetation or chemical changes in the bedrock.

In its solid form, carbon dioxide is used in fire extinguishers, in laboratories, and in theater and stage productions as dry ice to make fog. The use of dry ice can elevate indoor CO2 if the air is not ventilated. Where CO2 levels in soils are high, the gas can seep into basements through stone walls or cracks in floors and foundations.

Have an HVAC or weatherization contractor measure CO2 levels within your home. If the levels exceed 1,000 ppm, the furnace should be tuned to increase levels of fresh air coming into the building. If levels are above 2,000 ppm, this can be a serious condition that could warrant HVAC modification. Never use a fire extinguisher or dry ice in a manner by which it was not intended. Never enter a liquid manure pit without protective equipment since CO2, along with ammonia, methane, and hydrogen sulfide generated from decomposing manure can quickly cause loss of consciousness and death. Use care when entering silos since CO2 can build up from the decomposing grain.

There are no indoor air standards for CO2; however, high indoor air levels of carbon dioxide could be an indicator the HVAC (heating, ventilation, and air conditioning) system is not working properly. The amount of carbon dioxide in a building is usually related to how much fresh air is being brought into that building.

  • In general, the higher the CO2 level in the building, the lower the amount of fresh air exchange.
  • Therefore, examining levels of CO2 in indoor air can reveal if the HVAC systems are operating within guidelines.
  • CO2 levels are usually measured in percent (%) of air or parts per million (ppm).
  • High CO2 levels, generally over 1000 ppm, indicate a potential problem with air circulation and fresh air in a room or building.

In general, high CO2 levels indicate the need to examine the HVAC system. High carbon dioxide levels can cause poor air quality and can even extinguish pilot lights on gas-powered appliances. Everyone’s Reaction is Different A person’s reaction to chemicals depends on several things, including individual health, heredity, previous exposure to chemicals including medicines, and personal habits such as smoking or drinking.

It’s also important to consider the length of exposure to the chemical, the amount of chemical exposure, and whether the chemical was inhaled, touched, or eaten. Exposure to CO2 can produce a variety of health effects. These may include headaches, dizziness, restlessness, a tingling or pins or needles feeling, difficulty breathing, sweating, tiredness, increased heart rate, elevated blood pressure, coma, asphyxia, and convulsions.

The levels of CO2 in the air and potential health problems are:

400 ppm: average outdoor air level.400–1,000 ppm: typical level found in occupied spaces with good air exchange.1,000–2,000 ppm: level associated with complaints of drowsiness and poor air.2,000–5,000 ppm: level associated with headaches, sleepiness, and stagnant, stale, stuffy air. Poor concentration, loss of attention, increased heart rate and slight nausea may also be present.5,000 ppm: this indicates unusual air conditions where high levels of other gases could also be present. Toxicity or oxygen deprivation could occur. This is the permissible exposure limit for daily workplace exposures.40,000 ppm: this level is immediately harmful due to oxygen deprivation.

Last Revised: June 15, 2022

Does CO2 follow ideal gas law?

So no, carbon dioxide is not an ideal gas because it has attractive and repulsive forces between particles, gas particles have a volume, and the collisions are not elastic. Generally speaking, a real gas approaches ideal behavior in high temperatures and low pressures.

What is dissolved CO2?

Inorganic Carbon in Waters – Dissolved inorganic carbon (DIC = dissolved CO 2 + HCO 3 − + CO 3 = ) is present in all natural waters. Dissolved CO 2 actually consists of two pools, free CO 2 and H 2 CO 3, At equilibrium with each other, which is extremely rapid, H 2 CO 3 is about 1/1000 of the concentration of free CO 2,

  • Neither CO 2 nor H 2 CO 3 is charged; they interchange readily and behave as one pool in chemical reactions.
  • Thus, we treat CO 2 + H 2 CO 3 as a single pool and refer to it as either H 2 CO 3 * or simply as CO 2,
  • H 2 CO 3 * is also known as carbonic acid because it can behave as a proton (H + ) and a bicarbonate ion (HCO 3 − ).

It is a weak acid but very prevalent in the biosphere and extremely important in processes like weathering and ocean acidification. The concentration of DIC varies from less than 0.24 mg C/L (20 μM) in acidic, poorly buffered waters to more than 60 mg C/L (5000 μM) in highly alkaline hard waters, but ranges between about 1.2 and 120 mg C/L (100 to 10,000 μM) in most freshwater and averages about 29 mg C/L (2400 μM) in the ocean.

  • DIC is usually the most abundant form of C in water.
  • Although CO 2, like other gases, readily exchanges with the atmosphere, even the surface waters of most inland waters are usually greatly supersaturated with respect to the atmosphere.
  • A number of factors cause this disequilibrium, including respiration in excess of photosynthesis, CO 2 inputs from groundwater, or the precipitation of CaCO 3, which releases CO 2 (see Cole et al.1994 ).

Inorganic C is intimately involved in many of the acid-base reactions in soils and water. Bicarbonate and carbonate constitute the major buffers in most natural waters and thus account for most of the acid-neutralizing capacity (ANC; also called alkalinity).

What is Henry’s law constant for o2?

Henry’s law constant of oxygen is 1.4×10−3mol.

What is Henry’s law constant K?

11.2.1 HENRY’S LA W CONSTANT (K H ) – The Henry’s law constant (K H ) (also called the air–water partition coefficient ) is the ratio of a compound’s partial pressure in air to the concentration of the compound in water at a given temperature. Values for Henry’s law constants are expressed in units of atmospheres for air to moles per cubic meter for water (atm-m 3 /mol) or in a dimensionless unit described as K H′ = K H /( RT ) where K H′ is the dimensionless Henry’s law constant, K H is the Henry’s law constant (atm-m 3 /mol), R is the ideal gas constant (8.20575 × 10 −5 atm-m 3 /mol-K) and T is the water temperature (K).

As a rule of thumb, compounds with a Henry’s law constant greater than 10 −3 atm-m 3 /mol and a molecular weight less than 200 grams per mole are considered volatile ( United States Environmental Protection Agency, 1996 ). A compound with a Henry’s law constant less than about 5 × 10– 5 atm-m 3 /mol is considered soluble and tends to remain in water ( Olson and Davis, 1990 ).

Ranges of Henry’s law constant values in (atm-m 3 /mol) for selected chlorinated solvents are trichloroethylene (1.2 × 10 −2 to 9.9 × 10 −3 ), tetrachloroethylene (1.3 × 10 −2 to 2.9 × 10 −3 ), carbon tetrachloride (2.3 × 10 −2 to 3.0 × 10 −2 ), methylene chloride (2.0 × 10 −3 to 2.9 × 10 −3 ), and 1,1,1-trichloroethane (1.3 × 10 −2 to 1.8 × 10 −2 ) ( Hine and Mookerjee, 1975 ; United States Environmental Protection Agency, 1980 ; Lyman et al., 1982 ; Roberts and Dandliker, 1983 ; Lincoff and Gossett, 1984 ; Warner et al., 1987 ; Pankow and Rosen, 1988 ; Schwille, 1988 ; Mercer and Cohen, 1990 ; Montgomery, 1991 ).

Is Henry’s constant constant for all gases?

The value of Henry constant `K_(H)` is constant for all gases. not related to the solubility of gases. Solution : is the correct answer. In general, higher the value of `K_(H)` lower is the solubility of gas in a liquid.

How is Henry’s constant related to temperature?

State Henry’s law. State the relationship between Henry’s law constant and solubility of a gas. Answer Verified Hint: Maximum solubility of the solute which can be dissolved in a specified amount of solvent at a constant temperature is known as the solubility of the solute in the solvent.

Complete step by step answer: Thus, when $ = 1$, $S = P$, Note:

There are various definitions that fit with Henry’s law. They can be stated as:”Henry’s law can be stated as at constant temperature, the solubility of a gas in a particular liquid is directly proportional to the partial pressure of the gas present above the surface of the liquid.” or,”The mole fraction of a gas in the solution is proportional to the partial pressure of the gas over the solution.” Or, “The partial pressure of the gas in vapor phase ($P$ ) is proportional to the mole fraction of the gas ($x$ ) in the solution.” According to this definition,$P = x$ Where, $ = $ Henry’s constantThe law states that at a constant temperature, the solubility (\ ) of a gas in a liquid is directly proportional to the pressure (\ ) of the gas.

  1. Thus the solubility of gas at unit pressure is equal to Henry’s constant.$S = P$ Henry’s constant is not a universal constant.
  2. It depends upon the nature of the gas and the temperature.
  3. Henry’s constant increases with an increase in the temperature.
  4. Therefore, the solubility of the gas decreases.
  5. Increasing the pressure increases the solubility and increase in temperature decreases the solubility of the gas in the liquid.

: State Henry’s law. State the relationship between Henry’s law constant and solubility of a gas.

How do you calculate the solubility of co2 in water?

The solubility of carbon dioxide gas is proportional to the pressure of the gas above the liquid. Solubility × pressure factor = solubility Since pressure increases, solubility increases, and the pressure factor is greater than one.

What is the value of Henry constant?

Henry’s constant for oxygen dissolved in water is $4.34 \times \; }$ at $ }$.

What is the solubility constant of carbon dioxide?

SOLUBILITY AND DIFFUSION OF GASES – Henry’s law states that at equilibrium the amount of gas dissolved in a liquid is proportional to the partial pressure of that gas, so long as temperature is constant: Dissolved gas = partial pressure (p) x solubility coefficient (S) Where S is a temperature dependant constant for the particular gas.

The solubility coefficient (S) for carbon dioxide at body temperature is 0.23 mmol/L/kPa (or 0.03 mmol/mmHg), Thus since arterial p CO 2 is approximately 5.3 kPa (40 mmHg), the amount of CO 2 dissolved in arterial blood (dCO 2 ) is (5.3 x 0.23) or 40 x 0.03) = 1.2 mmol/L. The movement (diffusion) of gases is determined in large part by concentration gradients.

Gas diffuses from high partial pressure to low partial pressure,

What is solubility of CO2 in water?

Value 0.759 Dissolved CO2 volume/volume H2O Range: Table – link Dissolved CO2 volume/volume H2O Organism Generic Reference Dean JA, Lange’s handbook of chemistry, 15th edition 1999 McGraw-Hill, inc. pp.5.4-5.5 table 5.1 Comments The column headed ‘a’ gives the dissolved CO2 volume per volume H2O-the volume of gas (in ml) measured at standard conditions (0°C and 760mm or 101.325kN/m^2) dissolved in 1mL of water at the temperature stated (in degrees Celsius) and when the pressure of the gas without that of the water vapor is 760mm. The column headed ‘q’ gives grams CO2 per 100 ml H2O-the weight of gas (in grams) dissolved in 100g of water when the pressure of the gas plus that of the water vapor is 760mm.0.1449 grams CO2 per 100 ml H2O at 25°C. Entered by Uri M ID 106207

What is partial pressure CO2?

Definition/Introduction – The partial pressure of carbon dioxide (PCO2) is the measure of carbon dioxide within arterial or venous blood. It often serves as a marker of sufficient alveolar ventilation within the lungs. Generally, under normal physiologic conditions, the value of PCO2 ranges between 35 to 45 mmHg, or 4.7 to 6.0 kPa.