(B) The spontaneity of a process depends on the tendency to acquire a minimum energy state and maximum randomness (entropy).For a spontaneous process

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For a spontaneous process in an isolated system,the change in entropy is positive.

(B) The spontaneity of a process depends on the tendency to acquire a minimum energy state and maximum randomness (entropy).For a spontaneous process in an isolated system,the total change in entropy $(\Delta S_{total})$ must be greater than zero,i.e.,$\Delta S > 0$.

Class 11 Chemistry Thermodynamics 2 nd Law of thermodynamics and Entropy

Medium

Identify the correct statement regarding a spontaneous process:

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A
Lowering of energy in the process is the only criterion for spontaneity.
B
For a spontaneous process in an isolated system,the change in entropy is positive.
C
Endothermic processes are never spontaneous.
D
Exothermic processes are always spontaneous.

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Class 11

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Thermodynamics

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2 nd Law of thermodynamics and Entropy

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AIEEE 2007 Paper All AIEEE years →

Calculate the entropy change in $J \, mol^{-1} K^{-1}$ for the isothermal reversible expansion of $2 \, mol$ of an ideal gas from a volume of $10 \, dm^3$ to $100 \, dm^3$ at $27 \, ^oC$.

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The standard entropies of $CO_{2(g)}$,$C_{(s)}$,and $O_{2(g)}$ are $213.5$,$5.740$,and $205 \ J \ K^{-1} \ mol^{-1}$ respectively. The standard entropy of formation of $CO_{2(g)}$ is $...... \ J \ K^{-1} \ mol^{-1}$.

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For the vaporization of water at $1 \, \text{atm}$ pressure,the liquid water and water vapor are in equilibrium. What is the temperature in $K$?
$H_2O_{(l)} \rightleftharpoons H_2O_{(g)}$ [at $1 \, \text{atm}$ pressure] [$\Delta S = 120 \, J K^{-1}$ and $\Delta H = +45.0 \, kJ$]

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For which one of the following reactions, the entropy change is positive?

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State the characteristics of entropy.

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Identify the correct statement regarding a spontaneous process:

Similar Questions

Calculate the entropy change in $J \, mol^{-1} K^{-1}$ for the isothermal reversible expansion of $2 \, mol$ of an ideal gas from a volume of $10 \, dm^3$ to $100 \, dm^3$ at $27 \, ^oC$.

The standard entropies of $CO_{2(g)}$,$C_{(s)}$,and $O_{2(g)}$ are $213.5$,$5.740$,and $205 \ J \ K^{-1} \ mol^{-1}$ respectively. The standard entropy of formation of $CO_{2(g)}$ is $...... \ J \ K^{-1} \ mol^{-1}$.

For the vaporization of water at $1 \, \text{atm}$ pressure,the liquid water and water vapor are in equilibrium. What is the temperature in $K$?$H_2O_{(l)} \rightleftharpoons H_2O_{(g)}$ [at $1 \, \text{atm}$ pressure] [$\Delta S = 120 \, J K^{-1}$ and $\Delta H = +45.0 \, kJ$]

For which one of the following reactions, the entropy change is positive?

State the characteristics of entropy.

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For the vaporization of water at $1 \, \text{atm}$ pressure,the liquid water and water vapor are in equilibrium. What is the temperature in $K$?
$H_2O_{(l)} \rightleftharpoons H_2O_{(g)}$ [at $1 \, \text{atm}$ pressure] [$\Delta S = 120 \, J K^{-1}$ and $\Delta H = +45.0 \, kJ$]