Find out the total heat given to diatomic gas in the process \(A\rightarrow B \rightarrow C\): \(( B\rightarrow C\) is isothermal)
1. \(P_0V_0+ 2P_0V_0\ln 2\)
2. \(\frac{1}{2}P_0V_0+ 2P_0V_0\ln 2\)
3. \(\frac{5}{2}P_0V_0+ 2P_0V_0\ln 2\)
4. \(3P_0V_0+ 2P_0V_0\ln 2\)
The efficiency of a Carnot engine is 40% when it receives energy at 500 K. At what temperature it should receive energy to increase its efficiency by 25% ?
1. | 600 K | 2. | 700 K |
3. | 800 K | 4. | 900 K |
When a bicycle tyre suddenly bursts, the air inside the tyre expands. This process is:
1. | isothermal | 2. | adiabatic |
3. | isobaric | 4. | isochoric |
Which of the following is true for the molar heat capacity of an ideal gas?
1. | It cannot be negative. |
2. | It has only two values \(\left(C_P \text { and } C_V\right)\). |
3. | It can have any value. |
4. | It cannot be zero. |
\(0.04\) mole of an ideal monatomic gas is allowed to expand adiabatically so that its temperature changes from \(800~\text{K}\) to \(500~\text{K}\). The work done during expansion is nearly equal to:
1. | \(129.6\) J | 2. | \(-129.6\) J |
3. | \(149.6\) J | 4. | \(-149.6\) J |
The internal energy of an ideal gas increases in:
1. Adiabatic expansion
2. Adiabatic compression
3. Isothermal expansion
4. Isothermal compression
1. \(V_1= V_2\)
2. \(V_1> V_2\)
3. \(V_1< V_2\)
4. \(V_1\ge V_2\)
A heat engine is working between 200 K and 400 K. The efficiency of the heat engine may be:
1. 20%
2. 40%
3. 50%
4. All of these