The correct statement for a reversible process in a state of equilibrium is:
1. G = – 2.30RT log K
2. G = 2.30RT log K
3. Go = – 2.30RT log K
4. Go = 2.30RT log K

Subtopic:  Gibbs Energy Change |
 81%
Level 1: 80%+
NEET - 2015
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Give the following bond energies:
H—H bond energy: 431.37 kJ mol-1 
C=C bond energy: 606.10 kJ mol-1 
C—C bond energy: 336.49 kJ mol-1 
C—H bond energy: 410.50 kJ mol-1 

Enthalpy for the following reaction will be:

1. 1523.6 kJ mol-1
2. -243.6 kJ mol-1
3. -120.0 kJ mol-1
4. 553.0 kJ mol-1
Subtopic:  Thermochemistry |
 76%
Level 2: 60%+
AIPMT - 2009
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The values of ΔH and ΔS for the given reaction are 170 kJ and 170 JK-1, respectively.
C(graphite) + CO2(g)→2CO(g) 
This reaction will be spontaneous at:

1. 710 K
2. 910 K
3. 1110 K
4. 510 K

Subtopic:  Gibbs Energy Change |
 88%
Level 1: 80%+
AIPMT - 2009
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The standard free energies of formation(in kJ/mol) at 298 K are -237.2, -394.4, and -8.2 for H2O(l), CO2(g), and pentane (g), respectively. The value of Ecell for the pentane-oxygen fuel cell is:

1. 1.968 V
2. 2.0968 V
3. 1.0968 V
4. 0.0968 V

Subtopic:  Gibbs Energy Change |
 52%
Level 3: 35%-60%
AIPMT - 2008
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Which of the following is correct for isothermal expansion of an ideal gas:

1. Wrev = Wirr

2. Wrev + Wirr = 0

3. Wrev > Wirr

4. qrev = qirr

Subtopic:  First Law of Thermodynamics |
 71%
Level 2: 60%+
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Which, among the following, is not a state function?

1. Internal energy

2. Free energy

3. Work

4. Enthalpy

Subtopic:  Thermodynamics' Properties and process |
 89%
Level 1: 80%+
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Which among the following state functions is an extensive property of the system?

1. Temperature 2. Volume
3. Refractive index 4. Viscosity
Subtopic:  Classification of System, Extensive & Intensive Properties |
 81%
Level 1: 80%+
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The bond energies of CC, C-H, H-H, and C=C are 198, 98, 103, and 145 kcal respectively.

The enthalpy change of the reaction HCCH+H2C2H4 would be:

1. 48 kcal

2. 96 kcal

3. -40 kcal

4. -152 kcal

Subtopic:  Enthalpy & Internal energy |
 77%
Level 2: 60%+
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For the reaction, 2N2g+O2g2N2O(g), at 298K H is 164 kJ mol-1. The E of the reaction is-
1. \(166.5 \mathrm{~kJ} \mathrm{~mol}^{-1} \)
2. \(141.5 \mathrm{~kJ} \mathrm{~mol}^{-1} \)
3. \(104.0 \mathrm{~kJ} \mathrm{~mol}^{-1} \)
4. \(-169 \mathrm{~kJ} \mathrm{~mol}^{-1}\)

Subtopic:  Enthalpy & Internal energy |
 78%
Level 2: 60%+
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As an isolated box, equally partitioned, contains two ideal gasses A and B as shown:

 

When the partition is removed, the gases mix. The changes in enthalpy (H) and entropy (S) in the process, respectively, are

1. Zero, positive

2. Zero, negative

3. Positive, zero

4. Negative, zero

Subtopic:  Enthalpy & Internal energy |
 80%
Level 1: 80%+
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