Q. No.
The internal energy of an ideal gas decreases by the same amount as the work done by the system.
(a) The process must be adiabatic.
(b) The process must be isothermal.
(c) The process must be isobaric.
(d) The temperature must decrease
Choose the correct option
1. (a) , (b)
2. (b) , (c)
3. (c) , (d)
4. (a) , (d)
Work done by a sample of an ideal gas in a process A is double the work done in another process B. The temperature rises through the same amount in the two processes. If CA and CB be the molar heat capacities for the two processes,
1. CA = CB
2. CA < CB
3. CA > CB
4. CA and CB cannot be defined
For a solid with a small expansion coefficient,
1. Cp - CV = R
2. Cp = CV
3. Cp is slightly greater than CV
4. Cp is slightly less than CV
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
1. \(\frac{C_p}{C_v}\)
2. \(C_pC_v\)
3. \(C_p-C_v\)
4. \(C_p+C_v\)
1. \(30\) calories
2. \(50\) calories
3. \(70\) calories
4. \(90\) calories
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 = CV
3. C > CV
4. C < CV
The molar heat capacity for the process shown in the following figure is:
1. C = Cp
2. C = Cv
3. C > CV
4. C =0
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%.
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%.
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