Absolute Entropy and Third Law of Thermodynamics
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CHXI06:THERMODYNAMICS

369266 Assertion :
Enthalpy of graphite is lower than that of diamond.
Reason :
Entropy of graphite is greater than that of diamond.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI06:THERMODYNAMICS

369267 In which of the following process entropy of system is decreasing ?
(A) Freezing of water at \(\mathrm{0^{\circ} \mathrm{C}}\)
(B) Freezing of water at \(\mathrm{-10^{\circ} \mathrm{C}}\)
(C) Adsorption of \(\mathrm{\mathrm{H}_{2}}\) on \(\mathrm{\mathrm{Pb}}\)
(D) Dissolution of \(\mathrm{\mathrm{NaCl}}\) in \(\mathrm{\mathrm{H}_{2} \mathrm{O}}\)(E) \(\mathrm{\mathrm{N}_{2}(\mathrm{~g})+3 \mathrm{H}_{2}(\mathrm{~g}) \rightarrow 2 \mathrm{NH}_{3}(\mathrm{~g})}\)

1 A, B, C, E
2 A, B, C, D
3 A, B, C, D, E
4 A, B
JEE - 2021
CHXI06:THERMODYNAMICS

369268 For which among the following reactions, change in entropy is less than zero?

1 Sublimation of iodine
2 Dissociation of hydrogen
3 Formation of water
4 Thermal decomposition of calcium cabonate
MHTCET - 2015
CHXI06:THERMODYNAMICS

369269 \(\mathrm{1 \mathrm{~g}}\) ice absorbs \(\mathrm{335 \mathrm{~J}}\) of heat to melt at \(\mathrm{0^{\circ} \mathrm{C}}\). The entropy change will be

1 \({\rm{1}}{\rm{.2}}\,{\rm{J}}\,{{\rm{K}}^{{\rm{ - 1}}}}{\rm{\;mo}}{{\rm{l}}^{{\rm{ - 1}}}}\)
2 \({\rm{335}}\,{\rm{J}}\,{{\rm{K}}^{{\rm{ - 1}}}}{\rm{\;mo}}{{\rm{l}}^{{\rm{ - 1}}}}\)
3 \({\rm{22}}{\rm{.1}}\,{\rm{J}}\,{{\rm{K}}^{{\rm{ - 1}}}}{\rm{\;mo}}{{\rm{l}}^{{\rm{ - 1}}}}\)
4 \({\rm{0}}{\rm{.8}}\,{\rm{J}}\,{{\rm{K}}^{{\rm{ - 1}}}}{\rm{\;mo}}{{\rm{l}}^{{\rm{ - 1}}}}\)
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CHXI06:THERMODYNAMICS

369266 Assertion :
Enthalpy of graphite is lower than that of diamond.
Reason :
Entropy of graphite is greater than that of diamond.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI06:THERMODYNAMICS

369267 In which of the following process entropy of system is decreasing ?
(A) Freezing of water at \(\mathrm{0^{\circ} \mathrm{C}}\)
(B) Freezing of water at \(\mathrm{-10^{\circ} \mathrm{C}}\)
(C) Adsorption of \(\mathrm{\mathrm{H}_{2}}\) on \(\mathrm{\mathrm{Pb}}\)
(D) Dissolution of \(\mathrm{\mathrm{NaCl}}\) in \(\mathrm{\mathrm{H}_{2} \mathrm{O}}\)(E) \(\mathrm{\mathrm{N}_{2}(\mathrm{~g})+3 \mathrm{H}_{2}(\mathrm{~g}) \rightarrow 2 \mathrm{NH}_{3}(\mathrm{~g})}\)

1 A, B, C, E
2 A, B, C, D
3 A, B, C, D, E
4 A, B
JEE - 2021
CHXI06:THERMODYNAMICS

369268 For which among the following reactions, change in entropy is less than zero?

1 Sublimation of iodine
2 Dissociation of hydrogen
3 Formation of water
4 Thermal decomposition of calcium cabonate
MHTCET - 2015
CHXI06:THERMODYNAMICS

369269 \(\mathrm{1 \mathrm{~g}}\) ice absorbs \(\mathrm{335 \mathrm{~J}}\) of heat to melt at \(\mathrm{0^{\circ} \mathrm{C}}\). The entropy change will be

1 \({\rm{1}}{\rm{.2}}\,{\rm{J}}\,{{\rm{K}}^{{\rm{ - 1}}}}{\rm{\;mo}}{{\rm{l}}^{{\rm{ - 1}}}}\)
2 \({\rm{335}}\,{\rm{J}}\,{{\rm{K}}^{{\rm{ - 1}}}}{\rm{\;mo}}{{\rm{l}}^{{\rm{ - 1}}}}\)
3 \({\rm{22}}{\rm{.1}}\,{\rm{J}}\,{{\rm{K}}^{{\rm{ - 1}}}}{\rm{\;mo}}{{\rm{l}}^{{\rm{ - 1}}}}\)
4 \({\rm{0}}{\rm{.8}}\,{\rm{J}}\,{{\rm{K}}^{{\rm{ - 1}}}}{\rm{\;mo}}{{\rm{l}}^{{\rm{ - 1}}}}\)
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CHXI06:THERMODYNAMICS

369266 Assertion :
Enthalpy of graphite is lower than that of diamond.
Reason :
Entropy of graphite is greater than that of diamond.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI06:THERMODYNAMICS

369267 In which of the following process entropy of system is decreasing ?
(A) Freezing of water at \(\mathrm{0^{\circ} \mathrm{C}}\)
(B) Freezing of water at \(\mathrm{-10^{\circ} \mathrm{C}}\)
(C) Adsorption of \(\mathrm{\mathrm{H}_{2}}\) on \(\mathrm{\mathrm{Pb}}\)
(D) Dissolution of \(\mathrm{\mathrm{NaCl}}\) in \(\mathrm{\mathrm{H}_{2} \mathrm{O}}\)(E) \(\mathrm{\mathrm{N}_{2}(\mathrm{~g})+3 \mathrm{H}_{2}(\mathrm{~g}) \rightarrow 2 \mathrm{NH}_{3}(\mathrm{~g})}\)

1 A, B, C, E
2 A, B, C, D
3 A, B, C, D, E
4 A, B
JEE - 2021
CHXI06:THERMODYNAMICS

369268 For which among the following reactions, change in entropy is less than zero?

1 Sublimation of iodine
2 Dissociation of hydrogen
3 Formation of water
4 Thermal decomposition of calcium cabonate
MHTCET - 2015
CHXI06:THERMODYNAMICS

369269 \(\mathrm{1 \mathrm{~g}}\) ice absorbs \(\mathrm{335 \mathrm{~J}}\) of heat to melt at \(\mathrm{0^{\circ} \mathrm{C}}\). The entropy change will be

1 \({\rm{1}}{\rm{.2}}\,{\rm{J}}\,{{\rm{K}}^{{\rm{ - 1}}}}{\rm{\;mo}}{{\rm{l}}^{{\rm{ - 1}}}}\)
2 \({\rm{335}}\,{\rm{J}}\,{{\rm{K}}^{{\rm{ - 1}}}}{\rm{\;mo}}{{\rm{l}}^{{\rm{ - 1}}}}\)
3 \({\rm{22}}{\rm{.1}}\,{\rm{J}}\,{{\rm{K}}^{{\rm{ - 1}}}}{\rm{\;mo}}{{\rm{l}}^{{\rm{ - 1}}}}\)
4 \({\rm{0}}{\rm{.8}}\,{\rm{J}}\,{{\rm{K}}^{{\rm{ - 1}}}}{\rm{\;mo}}{{\rm{l}}^{{\rm{ - 1}}}}\)
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CHXI06:THERMODYNAMICS

369266 Assertion :
Enthalpy of graphite is lower than that of diamond.
Reason :
Entropy of graphite is greater than that of diamond.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI06:THERMODYNAMICS

369267 In which of the following process entropy of system is decreasing ?
(A) Freezing of water at \(\mathrm{0^{\circ} \mathrm{C}}\)
(B) Freezing of water at \(\mathrm{-10^{\circ} \mathrm{C}}\)
(C) Adsorption of \(\mathrm{\mathrm{H}_{2}}\) on \(\mathrm{\mathrm{Pb}}\)
(D) Dissolution of \(\mathrm{\mathrm{NaCl}}\) in \(\mathrm{\mathrm{H}_{2} \mathrm{O}}\)(E) \(\mathrm{\mathrm{N}_{2}(\mathrm{~g})+3 \mathrm{H}_{2}(\mathrm{~g}) \rightarrow 2 \mathrm{NH}_{3}(\mathrm{~g})}\)

1 A, B, C, E
2 A, B, C, D
3 A, B, C, D, E
4 A, B
JEE - 2021
CHXI06:THERMODYNAMICS

369268 For which among the following reactions, change in entropy is less than zero?

1 Sublimation of iodine
2 Dissociation of hydrogen
3 Formation of water
4 Thermal decomposition of calcium cabonate
MHTCET - 2015
CHXI06:THERMODYNAMICS

369269 \(\mathrm{1 \mathrm{~g}}\) ice absorbs \(\mathrm{335 \mathrm{~J}}\) of heat to melt at \(\mathrm{0^{\circ} \mathrm{C}}\). The entropy change will be

1 \({\rm{1}}{\rm{.2}}\,{\rm{J}}\,{{\rm{K}}^{{\rm{ - 1}}}}{\rm{\;mo}}{{\rm{l}}^{{\rm{ - 1}}}}\)
2 \({\rm{335}}\,{\rm{J}}\,{{\rm{K}}^{{\rm{ - 1}}}}{\rm{\;mo}}{{\rm{l}}^{{\rm{ - 1}}}}\)
3 \({\rm{22}}{\rm{.1}}\,{\rm{J}}\,{{\rm{K}}^{{\rm{ - 1}}}}{\rm{\;mo}}{{\rm{l}}^{{\rm{ - 1}}}}\)
4 \({\rm{0}}{\rm{.8}}\,{\rm{J}}\,{{\rm{K}}^{{\rm{ - 1}}}}{\rm{\;mo}}{{\rm{l}}^{{\rm{ - 1}}}}\)