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 |
 71%
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The intensive property among the following is:

1. Volume 
2. Enthalpy 
3. Molar heat capacity 
4. Internal energy 
Subtopic:  Classification of System, Extensive & Intensive Properties |
 73%
From NCERT
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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 |
 89%
From NCERT
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For which of the following equations, \(\Delta H > \Delta E \) ? 

\(1.~~\mathrm{N}_{2}(g)+3 \mathrm{H}_{2}(\mathrm{~g}) \longrightarrow 2 \mathrm{NH}_{3}(\mathrm{g})\\ \\ 2.~~\mathrm{H}_{2}(g)+\frac{1}{2} \mathrm{O}_{2}(\mathrm{~g}) \longrightarrow \mathrm{H}_{2} \mathrm{O}(\mathrm{l})\\ \\ 3.~~\mathrm{PCl}_{5}(g) \rightarrow \mathrm{PCl}_{3}(g)+\mathrm{Cl}_{2}(g)\\ 4.~~\mathrm{H}_{2}(\mathrm{~g})+\mathrm{I}_{2}(\mathrm{~g}) \rightarrow 2 \mathrm{HI}(\mathrm{g}) \)
Subtopic:  Enthalpy & Internal energy |
 79%
From NCERT
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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 |
 58%
From NCERT
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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 |
 68%
From NCERT
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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 |
 65%
From NCERT
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Assertion (A): The increase in internal energy \((\Delta E ) \) for the vapourization 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 |
 76%
From NCERT
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Match List I with List II 
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 

Choose the correct answer from the options given below: 
1.  A-I, B-III, C-II, D-IV
2.  A-I, B-II, C-III, D-IV 
3.  A-III, B-I, C-IV, D-II
4.  A-III, B-I, C-II, D-IV
Subtopic:  Classification of System, Extensive & Intensive Properties | Cp & Cv |
 81%
From NCERT
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An ideal gas expands isothermally from 10-3m3 to 10-2 m3 at 300 K against a constant pressure of 105 Nm-2. The work done by  the gas is:

1. +270 kJ 2. -900 J
3. +900 kJ 4. -900 kJ
Subtopic:  First Law of Thermodynamics |
 70%
From NCERT
NEET - 2019
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