What is henry's law give some explanation

Question

What is henry's law give some explanation

Answer 1

Henry's law is part of the general gas law that says that the pressure of a specific quantity of gas is proportional to the temperature and inversely proportional to the volume.  The other part is called Charles' law.

Answer 2

The solubility of a gas in a liquid depends on temperature, the partial pressure of the gas over the liquid, the nature of the solvent and the nature of the gas. The most common solvent is water.

Gas solubility is always limited by the equilibrium between the gas and a saturated solution of the gas. The dissolved gas will always follow Henry's law.

The concentration of dissolved gas depends on the partial pressure of the gas. The partial pressure controls the number of gas molecule collisions with the surface of the solution. If the partial pressure is doubled the number of collisions with the surface will double. The increased number of collisions produce more dissolved gas.

The illustration shows that if the pressure is doubled then the concentration of dissolved gas will double.

The dissolving process for gases is an equilibrium. The solubility of a gas depends directly on the gas pressure. The number of molecules leaving the gas phase to enter the solution equals the number of gas molecules leaving the solution. If the temperature stays constant increasing the pressure will increase the amount of dissolved gas.

Gas solubility is directly proportional to gas partial pressure.

Hence,Partial Pressure of Gas = k * Concentration at Constant Temperature.

The Henry's law constant "k" is different for every gas, temperature and solvent. The units on "k" depend on the units used for concentration and pressure.

The value for k is the same for the same temperature, gas and solvent. This means the concentration to pressure ratio is the same when pressures change. The following equation can be used to relate pressure and concentration changes,

C1/P1 = C2/P2.

The concentration terms should be chosen according to the terms in the value of k.

Answer 3

What is henry's law give some explanation

Answer 4

A formula for Henry's Law is:



where:

is approximately 2.7182818, the base of the natural logarithm (also called Euler's number)

is the partial pressure of the solute above the solution

is the concentration of the solute in the solution (in one of its many units)

is the Henry's Law constant, which has units such as L·atm/mol, atm/(mol fraction) or Pa·m3/mol.

Taking the natural logarithm of the formula, gives us the more commonly used formula:[1]



Some values for k include:

oxygen (O2) : 769.2 L·atm/mol      

carbon dioxide (CO2) : 29.4 L·atm/mol      

hydrogen (H2) : 1282.1 L·atm/mol    

when these gases are dissolved in water at 298 kelvin.

Note that in the above, the unit of concentration was chosen to be molarity. Hence the dimensional units: L is liters of solution, atm is the partial pressure of the gaseous solute above the solution (in atmospheres of absolute pressure), and mol is the moles of the gaseous solute in the solution. Also note that the Henry's Law constant, k, varies with the solvent and the temperature.

As discussed in the next section, there are other forms of Henry's Law each of which defines the constant k differently and requires different dimensional units.[2] The form of the equation presented above is consistent with the given example numerical values for oxygen, carbon dioxide and hydrogen and with their corresponding dimensional units.