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Q. No.Thermodynamics is not concerned about:
| 1. | Energy changes involved in a chemical reaction. |
| 2. | The extent to which a chemical reaction proceeds. |
| 3. | The rate at which a reaction proceeds. |
| 4. | The feasibility of a chemical reaction. |
Subtopic: Thermodynamics' Properties and process |
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The intensive property among the following is:
1. Volume
2. Enthalpy
3. Molar heat capacity
4. Internal energy
1. Volume
2. Enthalpy
3. Molar heat capacity
4. Internal energy
Subtopic: Classification of System, Extensive & Intensive Properties |
75%
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The pair of isochoric among the transformation of state is:
1. K to L and L to M
2. L to M and N to K
3. L to M and M to N
4. M to N and N to K
Subtopic: Classification of System, Extensive & Intensive Properties |
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For which of the following equations, \(\Delta H > \Delta E \) ?
\(1.~~\mathrm{N}_{2}(g)+3 \mathrm{H}_{2}(\mathrm{~g}) \longrightarrow 2 \mathrm{NH}_{3}(\mathrm{g})\\ \\ 2.~~\mathrm{H}_{2}(g)+\frac{1}{2} \mathrm{O}_{2}(\mathrm{~g}) \longrightarrow \mathrm{H}_{2} \mathrm{O}(\mathrm{l})\\ \\ 3.~~\mathrm{PCl}_{5}(g) \rightarrow \mathrm{PCl}_{3}(g)+\mathrm{Cl}_{2}(g)\\ 4.~~\mathrm{H}_{2}(\mathrm{~g})+\mathrm{I}_{2}(\mathrm{~g}) \rightarrow 2 \mathrm{HI}(\mathrm{g}) \)
\(1.~~\mathrm{N}_{2}(g)+3 \mathrm{H}_{2}(\mathrm{~g}) \longrightarrow 2 \mathrm{NH}_{3}(\mathrm{g})\\ \\ 2.~~\mathrm{H}_{2}(g)+\frac{1}{2} \mathrm{O}_{2}(\mathrm{~g}) \longrightarrow \mathrm{H}_{2} \mathrm{O}(\mathrm{l})\\ \\ 3.~~\mathrm{PCl}_{5}(g) \rightarrow \mathrm{PCl}_{3}(g)+\mathrm{Cl}_{2}(g)\\ 4.~~\mathrm{H}_{2}(\mathrm{~g})+\mathrm{I}_{2}(\mathrm{~g}) \rightarrow 2 \mathrm{HI}(\mathrm{g}) \)
Subtopic: Enthalpy & Internal energy |
80%
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If water vapour is assumed to be a perfect gas, molar enthalpy change for vapourisation of 1 mol of water at 1 bar and 100°C is 41kJ mol–1. The internal energy change, when 1 mol of water is vapourised at 1 bar pressure and 100°C is:
1. 35.5 kJ mol–1
2. 37.9 kJ mol–1
3. 41 kJ mol–1
4. 44.2 kJ mol–1
Subtopic: Enthalpy & Internal energy |
59%
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A swimmer coming out from a pool is covered with a film of water weighing about 18g. The internal energy of vaporization at 298K. is-
∆vap H⊖ for water at 298K= 44.01kJ mol–1
1. 38.63 kJ
2. 43.82 J
3. 41.53 kJ
4. 40.33 J
Subtopic: Enthalpy & Internal energy |
69%
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The amount of heat required to raise the temperature of a body through 1 \(^\circ C\) is called its:
| 1. | Molar Heat | 2. | Specific Heat |
| 3. | Entropy | 4. | Heat capacity |
Subtopic: Cp & Cv |
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| Assertion (A): | The increase in internal energy \((\Delta E ) \) for the vapourisation of one mole of water at 1 atm and 373 K is zero. |
| Reason (R): | For all isothermal processes, \(\Delta E = 0 \). |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True and (R) is False. |
| 4. | (A) and (R) both are False. |
Subtopic: Enthalpy & Internal energy |
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Match List I with List II:
Choose the correct answer from the options given below:
| List I | List II | ||
| A. | \(\Delta H = q \) | I. | \(P_{ext} =0 \) |
| B. | Free expansion | II. | Heat |
| C. | Path function | III. | At constant pressure |
| D. | Reversible process | IV. | An infinitely slow process that proceeds through a series of equilibrium states |
| Options: | (A) | (B) | (C) | (D) |
| 1. | I | III | II | IV |
| 2. | I | II | III | IV |
| 3. | III | I | IV | II |
| 4. | III | I | II | IV |
Subtopic: Classification of System, Extensive & Intensive Properties | Cp & Cv |
80%
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An ideal gas expands isothermally from at 300 K against a constant pressure of . The work done by the gas is:
| 1. | +270 kJ | 2. | –900 J |
| 3. | +900 kJ | 4. | –900 kJ |
Subtopic: First Law of Thermodynamics |
71%
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