01. First Law of Thermodynamics and Application
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Thermodynamics

272689 Identify the correct statement regarding a spontaneous process.

1 For a spontaneous process in an isolated system, the change in entropy is positive
2 Endothermic processes are never spontaneous
3 Exothermic processes are always spontaneous
4 Lowering of energy in the reaction process is the only criterion for spontaneity
AIEEE-2007
Thermodynamics

272690 During which of the following processes, does entropy decrease?
A. Freezing of water to ice at $0^{\circ} \mathrm{C}$.
B. Freezing of water to ice at $-10^{\circ} \mathrm{C}$.
C. $\mathrm{N}_2(\mathrm{~g})+3 \mathrm{H}_2(\mathrm{~g}) \longrightarrow 2 \mathrm{NH}_3(\mathrm{~g})$
D. Adsorption of $\mathrm{CO}(\mathrm{g})$ and lead surface.
E. Dissolution of $\mathrm{NaCl}$ in water.

1 A, B, C and D
2 $\mathrm{B}$ and $\mathrm{C}$
3 $\mathrm{A}$ and $\mathrm{E}$
4 $A, C$ and $\mathrm{E}$
Shift-II
Thermodynamics

272696 Five moles of an ideal gas at 1 bar and $298 \mathrm{~K}$ is expanded into vacuum to double the volume. The work done is

1 $-\mathrm{RT} \operatorname{In}\left(\mathrm{V}_2 / \mathrm{V}_1\right)$
2 $-\mathrm{RT}\left(\mathrm{V}_2-\mathrm{V}_1\right)$
3 $\mathrm{C}_{\mathrm{v}}\left(\mathrm{T}_2-\mathrm{T}_1\right)$
4 zero
[JEE Main 2020
Thermodynamics

272703 According to the first law of thermodynamics which of the following quantities represents the change in a state function?

1 $\mathrm{qrev}$
2 $\mathrm{q}_{\mathrm{rev}} / \mathrm{W}_{\mathrm{rev}}$
3 $\mathrm{W}_{\text {rev }}$
4 $\mathrm{W}_{\text {rev }}$
5 $\mathrm{q}_{\mathrm{rev}}+\mathrm{W}_{\text {Iev }}$
**[JIPMER-2011]
For More Updates join with Us
Thermodynamics

272689 Identify the correct statement regarding a spontaneous process.

1 For a spontaneous process in an isolated system, the change in entropy is positive
2 Endothermic processes are never spontaneous
3 Exothermic processes are always spontaneous
4 Lowering of energy in the reaction process is the only criterion for spontaneity
AIEEE-2007
Thermodynamics

272690 During which of the following processes, does entropy decrease?
A. Freezing of water to ice at $0^{\circ} \mathrm{C}$.
B. Freezing of water to ice at $-10^{\circ} \mathrm{C}$.
C. $\mathrm{N}_2(\mathrm{~g})+3 \mathrm{H}_2(\mathrm{~g}) \longrightarrow 2 \mathrm{NH}_3(\mathrm{~g})$
D. Adsorption of $\mathrm{CO}(\mathrm{g})$ and lead surface.
E. Dissolution of $\mathrm{NaCl}$ in water.

1 A, B, C and D
2 $\mathrm{B}$ and $\mathrm{C}$
3 $\mathrm{A}$ and $\mathrm{E}$
4 $A, C$ and $\mathrm{E}$
Shift-II
Thermodynamics

272696 Five moles of an ideal gas at 1 bar and $298 \mathrm{~K}$ is expanded into vacuum to double the volume. The work done is

1 $-\mathrm{RT} \operatorname{In}\left(\mathrm{V}_2 / \mathrm{V}_1\right)$
2 $-\mathrm{RT}\left(\mathrm{V}_2-\mathrm{V}_1\right)$
3 $\mathrm{C}_{\mathrm{v}}\left(\mathrm{T}_2-\mathrm{T}_1\right)$
4 zero
[JEE Main 2020
Thermodynamics

272703 According to the first law of thermodynamics which of the following quantities represents the change in a state function?

1 $\mathrm{qrev}$
2 $\mathrm{q}_{\mathrm{rev}} / \mathrm{W}_{\mathrm{rev}}$
3 $\mathrm{W}_{\text {rev }}$
4 $\mathrm{W}_{\text {rev }}$
5 $\mathrm{q}_{\mathrm{rev}}+\mathrm{W}_{\text {Iev }}$
**[JIPMER-2011]
NEET DIGITAL LIBRARY
Thermodynamics

272689 Identify the correct statement regarding a spontaneous process.

1 For a spontaneous process in an isolated system, the change in entropy is positive
2 Endothermic processes are never spontaneous
3 Exothermic processes are always spontaneous
4 Lowering of energy in the reaction process is the only criterion for spontaneity
AIEEE-2007
Thermodynamics

272690 During which of the following processes, does entropy decrease?
A. Freezing of water to ice at $0^{\circ} \mathrm{C}$.
B. Freezing of water to ice at $-10^{\circ} \mathrm{C}$.
C. $\mathrm{N}_2(\mathrm{~g})+3 \mathrm{H}_2(\mathrm{~g}) \longrightarrow 2 \mathrm{NH}_3(\mathrm{~g})$
D. Adsorption of $\mathrm{CO}(\mathrm{g})$ and lead surface.
E. Dissolution of $\mathrm{NaCl}$ in water.

1 A, B, C and D
2 $\mathrm{B}$ and $\mathrm{C}$
3 $\mathrm{A}$ and $\mathrm{E}$
4 $A, C$ and $\mathrm{E}$
Shift-II
Thermodynamics

272696 Five moles of an ideal gas at 1 bar and $298 \mathrm{~K}$ is expanded into vacuum to double the volume. The work done is

1 $-\mathrm{RT} \operatorname{In}\left(\mathrm{V}_2 / \mathrm{V}_1\right)$
2 $-\mathrm{RT}\left(\mathrm{V}_2-\mathrm{V}_1\right)$
3 $\mathrm{C}_{\mathrm{v}}\left(\mathrm{T}_2-\mathrm{T}_1\right)$
4 zero
[JEE Main 2020
Thermodynamics

272703 According to the first law of thermodynamics which of the following quantities represents the change in a state function?

1 $\mathrm{qrev}$
2 $\mathrm{q}_{\mathrm{rev}} / \mathrm{W}_{\mathrm{rev}}$
3 $\mathrm{W}_{\text {rev }}$
4 $\mathrm{W}_{\text {rev }}$
5 $\mathrm{q}_{\mathrm{rev}}+\mathrm{W}_{\text {Iev }}$
**[JIPMER-2011]
Join With Us for More Updates
Thermodynamics

272689 Identify the correct statement regarding a spontaneous process.

1 For a spontaneous process in an isolated system, the change in entropy is positive
2 Endothermic processes are never spontaneous
3 Exothermic processes are always spontaneous
4 Lowering of energy in the reaction process is the only criterion for spontaneity
AIEEE-2007
Thermodynamics

272690 During which of the following processes, does entropy decrease?
A. Freezing of water to ice at $0^{\circ} \mathrm{C}$.
B. Freezing of water to ice at $-10^{\circ} \mathrm{C}$.
C. $\mathrm{N}_2(\mathrm{~g})+3 \mathrm{H}_2(\mathrm{~g}) \longrightarrow 2 \mathrm{NH}_3(\mathrm{~g})$
D. Adsorption of $\mathrm{CO}(\mathrm{g})$ and lead surface.
E. Dissolution of $\mathrm{NaCl}$ in water.

1 A, B, C and D
2 $\mathrm{B}$ and $\mathrm{C}$
3 $\mathrm{A}$ and $\mathrm{E}$
4 $A, C$ and $\mathrm{E}$
Shift-II
Thermodynamics

272696 Five moles of an ideal gas at 1 bar and $298 \mathrm{~K}$ is expanded into vacuum to double the volume. The work done is

1 $-\mathrm{RT} \operatorname{In}\left(\mathrm{V}_2 / \mathrm{V}_1\right)$
2 $-\mathrm{RT}\left(\mathrm{V}_2-\mathrm{V}_1\right)$
3 $\mathrm{C}_{\mathrm{v}}\left(\mathrm{T}_2-\mathrm{T}_1\right)$
4 zero
[JEE Main 2020
Thermodynamics

272703 According to the first law of thermodynamics which of the following quantities represents the change in a state function?

1 $\mathrm{qrev}$
2 $\mathrm{q}_{\mathrm{rev}} / \mathrm{W}_{\mathrm{rev}}$
3 $\mathrm{W}_{\text {rev }}$
4 $\mathrm{W}_{\text {rev }}$
5 $\mathrm{q}_{\mathrm{rev}}+\mathrm{W}_{\text {Iev }}$
**[JIPMER-2011]
For More Updates join with Us