Thermodynamic Laws Mock Tests

A gas undergoes an isothermal expansion at temperature T, doing 500 J of work on its surroundings. During the same process, the gas absorbs 200 J of heat. What is the change in internal energy of the gas?

A Carnot engine operates between a hot reservoir at 500 K and a cold reservoir at 300 K. The efficiency of the engine is:

A thermodynamic system undergoes a cyclic process ABCA. The work done by the system in one cycle is represented by the area enclosed in the P-V diagram. If the cycle is clockwise, the net work done by the system is:

One mole of an ideal gas with γ = 1.4 undergoes an adiabatic expansion. If the initial temperature is 400 K and the volume doubles, the final temperature is approximately:

An ideal gas undergoes an isothermal expansion at temperature T from volume V to volume 2V. The work done by the gas is: (n moles, R = gas constant)

An ideal gas undergoes an isothermal expansion at temperature T from volume V to 2V. The work done by the gas is:

In an isothermal process, which quantity remains constant?

One mole of an ideal gas at 300 K expands isothermally from volume V to 10V. What is the work done by the gas? (Take R = 8.314 J/mol-K)