Henry’s law states that at the amount of gas that is dissolved in a liquid is directly proportional to the partial pressure of that gas above the liquid when the temperature is kept constant. The constant of proportionality for this relationship is called Henry’s law constant (usually denoted by ‘k H ‘). The mathematical formula of Henry’s law is given by: P ∝ C ( or ) P = k H × C . Where, ‘P’ denotes the partial pressure of the gas in the atmosphere above the liquid. ‘C’ denotes the concentration of the dissolved gas. ‘k H ’ is the Henry’s law constant of the gas.

Henry’s law is a gas law which states that at the amount of gas that is dissolved in a liquid is directly proportional to the partial pressure of that gas above the liquid when the temperature is kept constant. The constant of proportionality for this relationship is called Henry’s law constant (usually denoted by ‘k H ‘). The mathematical formula of Henry’s law is given by: P ∝ C ( or ) P = k H × C . Where, ‘P’ denotes the partial pressure of the gas in the atmosphere above the liquid. ‘C’ denotes the concentration of the dissolved gas. ‘k H ’ is the Henry’s law constant of the gas.

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The equation, $\ln K = - \frac{ΔH °}{R} \frac{1}{T} + \frac{ΔS °}{R}$ is known as Van't Hoff equation.

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Important Questions on Physical and Chemical Equilibrium

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Chemistry>Physical Chemistry>Physical and Chemical Equilibrium>Van't Hoff Equation

The number of correct statement/s involving equilibria in physical processes from the following is ________

(A) Equilibrium is possible only in a closed system at a given temperature.

(B) Both the opposing processes occur at the same rate.

(D) For dissolution of solids in liquids, the solubility is constant at a given temperature.

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Chemistry>Physical Chemistry>Physical and Chemical Equilibrium>Van't Hoff Equation

The thermal dissociation equilibrium of

{CaCO}_{3} (s)

is studied under different conditions.

{CaCO}_{3} (s) ⇌ CaO (s) + {CO}_{2} (g)

For this equilibrium, the correct statement(s) is/are

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Chemistry>Physical Chemistry>Physical and Chemical Equilibrium>Van't Hoff Equation

State Henry's law.

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Chemistry>Physical Chemistry>Physical and Chemical Equilibrium>Van't Hoff Equation

State Henry's law.

MEDIUM

Chemistry>Physical Chemistry>Physical and Chemical Equilibrium>Van't Hoff Equation

If pressure is applied to the equilibrium of

solid ⇌ liquid

. The melting point of the solid

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Chemistry>Physical Chemistry>Physical and Chemical Equilibrium>Van't Hoff Equation

What will be the correct order of vapour pressure of water, acetone and ether at

30 ° C

. Given that among these compounds, water has maximum boiling point and ether has minimum boiling point?

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Chemistry>Physical Chemistry>Physical and Chemical Equilibrium>Van't Hoff Equation

Which of the following is not an example of physical equlibrium?

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Chemistry>Physical Chemistry>Physical and Chemical Equilibrium>Van't Hoff Equation

During depression of freezing point in a solution, the following are in equilibrium:

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Chemistry>Physical Chemistry>Physical and Chemical Equilibrium>Van't Hoff Equation

A liquid is kept in a closed vessel. If a glass plate (negligible mass) with a small hole is kept on the top of the liquid surface, then, the vapour pressure of the liquid in the vessel is

MEDIUM

Chemistry>Physical Chemistry>Physical and Chemical Equilibrium>Van't Hoff Equation

H_{2} S

is a toxic gas used in qualitative analysis. If solubility of

H_{2} S

in water at

S T P

0.195 m

. What is the value of

K_{H}

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Chemistry>Physical Chemistry>Physical and Chemical Equilibrium>Van't Hoff Equation

Select the correct statements.

MEDIUM

Chemistry>Physical Chemistry>Physical and Chemical Equilibrium>Van't Hoff Equation

At a particular temperature and atmospheric pressure, the solid and liquid phases of a pure substance can exist in equilibrium. Which of the following term defines this temperature?

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Chemistry>Physical Chemistry>Physical and Chemical Equilibrium>Van't Hoff Equation

H₂S, a toxic gas with rotten egg like smell, is used for the qualitative analysis. if the solubility of H₂S in water at STP is 0.195 m, calculate Henry's law constant.

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Chemistry>Physical Chemistry>Physical and Chemical Equilibrium>Van't Hoff Equation

What do you understand by 'Equilibrium'? Discuss one example of each of the following physical equilibria:
(i) Solid-liquid equilibrium
(ii) Liquid-gas equilibrium
(iii) Solid-solution equilibrium
(iv) Gas-solution equilibrium
Give one important characteristic of each of the above equilibria.

MEDIUM

Chemistry>Physical Chemistry>Physical and Chemical Equilibrium>Van't Hoff Equation

Which of the following represents equilibrium condition?

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Chemistry>Physical Chemistry>Physical and Chemical Equilibrium>Van't Hoff Equation

A liquid is kept in a closed vessel. If a glass plate of negligible mass with small hole is kept on top of the liquid surface, then vapour pressure of the liquid in the vessel is -

EASY

Chemistry>Physical Chemistry>Physical and Chemical Equilibrium>Van't Hoff Equation

Consider the following liquid - vapour equilibrium.

$Liquid ⇌ Vapour$

Which of the following relations is correct?

MEDIUM

Chemistry>Physical Chemistry>Physical and Chemical Equilibrium>Van't Hoff Equation

If the pressure is applied to the following equilibrium of