The figure shows the (P-V) diagram of an ideal gas undergoing a change of state from A to B. Four different paths I, II, III and IV, as shown in the figure, may lead to the same change of state.
a. | The change in internal energy is the same in cases IV and III but not in cases I and II. |
b. | The change in internal energy is the same in all four cases. |
c. | Work done is maximum in case I. |
d. | Work done is minimum in case II. |
Which of the following options contains only correct statements?
1. | (b), (c), (d) | 2. | (a), (d) |
3. | (b), (c) | 4. | (a), (c), (d) |
Work done during the given cycle is:
1. 4
2. 2
3.
4.
A given mass of gas expands from state A to state B by three paths, 1, 2 and 3, as shown in the figure. If respectively be the work done by the gas along the three paths, then:
1. | W1 > W2 > W3 | 2. | W1 < W2 < W3 |
3. | W1 = W2 = W3 | 4. | W1 < W2 = W3 |
The pressure-temperature (P-T) graph for two processes, A and B, in a system is shown in the figure. If and are work done by the gas in process A and B respectively, then:
1. =
2. <
3. >
4. = -
The pressure of a monoatomic gas increases linearly from N/m2 to N/m2 when its volume increases from 0.2 m3 to 0.5 m3. The work done by the gas is:
1.
2.
3.
4.
Two identical samples of a gas are allowed to expand, (i) isothermally and (ii) adiabatically. Work done will be:
1. | more in the isothermal process. |
2. | more in the adiabatic process. |
3. | equal in both processes. |
4. | none of the above. |
0.04 mole of an ideal monatomic gas is allowed to expand adiabatically so that its temperature changes from 800 K to 500 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