# The value of Cp – CV is 1.00 R for a gas sample in state A and is 1.08 R in state B. Let pA , pB denote the pressures and TA and TB denote the temperatures of the states A and B respectively. Most likely 1.  pA < pB and TA > TB 2.  pA > pB and TA < TB  3.  pA = PB and TA < TB 4.  pA > pB and TA = TB

Subtopic:  Molar Specific Heat |
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Let $$C_v$$ and $$​​C_p$$ denote the molar heat capacities of an ideal gas at constant volume and constant pressure, respectively. Which of the following is a universal constant?
1. $$\frac{C_p}{C_v}$$
2. $$C_pC_v$$
3. $$C_p-C_v$$
4. $$C_p+C_v$$
Subtopic:  Molar Specific Heat |
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$$70$$ calories of heat is required to raise the temperature of $$2$$ mole of an ideal gas at constant pressure from $$30^\circ~\mathrm{C}$$ to $$35^\circ~\mathrm{C}.$$ The amount of heat required to raise the temperature of the same gas through the same range at constant volume is:
1. $$30$$ calories
2. $$50$$ calories
3. $$70$$ calories
4. $$90$$ calories

Subtopic:  Molar Specific Heat |
66%
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The figure shows a process on a gas in which pressure and volume both change. The molar heat capacity for this process is C.

1.   C = 0

2.   C = C

3.   C > CV

4.   C < CV

Subtopic:  Molar Specific Heat |
63%
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The molar heat capacity for the process shown in the following figure is:

1.  C = Cp

2.  C = C

3.  C > CV

4.  C =0

Subtopic:  Molar Specific Heat |
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In an isothermal process on an ideal gas, the pressure increases by 0.5%. The volume decreases by about

1.  0.25%

2.  0.5%

3.  0.7%

4.  1%.

Subtopic:  Types of Processes |
75%
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In an adiabatic process on a gas with y = 1.4, the pressure is increased by 0.5%. The volume decreases by about

1.  0.36%

2.  0.5%

3.  0.7%

4.  1%.

Subtopic:  Types of Processes |
56%
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Two samples A and B are initially kept in the same state. The sample A is expanded through an adiabatic process and the sample B through an isothermal process. The final volumes of the samples are the same. The final pressures in A and B are pA and pB respectively.

1.  PA > PB

2.  PA = PB

3.  PA < PB

4.  The relation between pA and pB cannot be deduced.

Subtopic:  Types of Processes |
62%
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Let Ta and Tb be the final temperatures of the samples A and B respectively in the previous question.

1.  Ta < Tb

2.  Ta = Tb

3.  Ta > Tb

4.  The relation between Ta and Tb cannot be deduced.
Previous Question: Two samples A and B are initially kept in the same state. The sample A is expanded through an adiabatic process and the sample B through an isothermal process. The final volumes of the samples are the same.

Subtopic:  Types of Processes |
62%
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Let ΔWa and ΔWb be the work done by the systems A and B respectively in the previous question.

1.  ΔWa > ΔWb

2.  ΔWa = ΔWb

3.  ΔWa < ΔWb

4.  The relation between ΔWa and ΔWb cannot be deduced

Previous Question: Two samples A and B are initially kept in the same state. The sample A is expanded through an adiabatic process and the sample B through an isothermal process. The final volumes of the samples are the same.

Subtopic:  Work Done by a Gas |
72%
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