What is the correct relationship between changes in enthalpy and internal energy within the following options?

1. $$\Delta \mathrm{H}+\Delta \mathrm{U}=\Delta \mathrm{nR}$$
2. $$\Delta \mathrm{H}=\Delta \mathrm{U}-\Delta n_gRT$$
3. $$\Delta \mathrm{H}=\Delta \mathrm{U}+\Delta n_gRT$$
4. $$\Delta \mathrm{H} -\Delta \mathrm{U}=-\Delta n_gRT$$
Subtopic:  Enthalpy & Internal energy |
81%
From NCERT
NEET - 2023
Hints

Consider the following reaction:-

$$2H_2(g) + O_2(g) \rightarrow 2H_2O(g) \Delta_rH^\circ = -483.64 kJ.$$

What is the enthalpy change for the decomposition of one mole of water?
(Choose the right option).

1. 120.9 kJ
2. 241.82 kJ
3. 18 kJ
4. 100 kJ
Subtopic:  Thermochemistry |
87%
From NCERT
NEET - 2023
Hints

Which p-V curve among the following depicts the highest amount of work done?

 1 2 3 4
Subtopic:  2nd & 3rd Law of Thermodynamics |
84%
From NCERT
NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh
Hints
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NEET 2023 - Target Batch - Aryan Raj Singh

The work done when 1 mole of gas expands reversibly and isothermally from a pressure of 5 atm to 1 atm at 300 K is: ​
(Given log 5 = 0.6989 and R = 8.314 J K-1 mol-1)
1. zero J
2. 150 J
3. +4014.6 J
4. -4014.6 J

Subtopic:  First Law of Thermodynamics |
68%
From NCERT
NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh
Hints
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NEET 2023 - Target Batch - Aryan Raj Singh

One mole of an ideal gas at 300 K is expanded isothermally from 1 L to 10 L volume. $$\Delta U$$ for this process is:
(Use R = 8.314 J K–1 mol–1)
 1 1260 J 2 2520 J 3 5040 J 4 0 J
Subtopic:  First Law of Thermodynamics |
78%
From NCERT
NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Which of the following options correctly represents the relationship between $$C_p \text { and } C_V$$ for one mole of an ideal gas?

1. $$C_P=R C_V$$
2. $$C_V=RC_P$$
3. $$C_P+C_V=R$$
4. $$C_{\mathrm{P}}-\mathrm{C}_{\mathrm{V}}=\mathrm{R}$$

Subtopic:  Cp & Cv |
86%
From NCERT
NEET - 2021
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

For irreversible expansion of an ideal gas under isothermal condition, the correct option is :

1.

2.

3.

4.

Subtopic:  Spontaneity & Entropy |
64%
From NCERT
NEET - 2021
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

Hydrolysis of sucrose is given by the following reaction

Sucrose + H2$⇌$ Glucose + Fructose

If the equilibrium constant (Kc) is 2$×$1013 at 300 K, the value of ${∆}_{r}{G}^{⊝}$ at the same temperature will be:

1. 8.314 J mol-1 K-1$×$300 K$×$ln (2$×$1013)

2. 8.314 J mol-1 K-1$×$300 K$×$ln (3$×$1013)

3. -8.314 J mol-1 K-1$×$300 K$×$ln (4$×$1013)

4. -8.314 J mol-1 K-1$×$300 K$×$ln (2$×$1013)

Subtopic:  Gibbs Energy Change |
78%
From NCERT
NEET - 2020
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For the reaction, 2Cl(g) $\to$ Cl2(g), the correct option is:

1.

2.

3.

4.

Subtopic:  Enthalpy & Internal energy | Spontaneity & Entropy |
60%
From NCERT
NEET - 2020
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NEET 2023 - Target Batch - Aryan Raj Singh
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If for a certain reaction ${∆}_{r}H$ is 30 kJ mol–1 at 450 K, the value of ${∆}_{r}S$ (in JK–1 mol–1) for which the same reaction will be spontaneous at the same temperature is:

1. 70

2. –33

3. 33

4. -70

Subtopic:  Spontaneity & Entropy |
69%
From NCERT
NEET - 2020
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NEET 2023 - Target Batch - Aryan Raj Singh
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To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh