List of top Chemistry Questions on Thermodynamics asked in CUET (PG)

A 60 W electric heater was immersed in a gas taken in a constant-volume adiabatic container and it was switched on for 150s. The temperature of the gas increased by 50 °C. The heat capacity of the gas is

The correct statements for second law of thermodynamics is/are
A. Heat does not flow spontaneously from a cool body to a hotter body
B. The entropy of perfectly crystalline substance is zero at 0 K.
C. No process is possible in which the sole result is the absorption of heat from a reservoir and its complete conversion to work.
D. For a spontaneous change ΔS_total > 0
Choose the most appropriate answer from the options given below:

A liquid having molar mass of 50 g mol^-1 boils at 80°C. If the latent heat of vapourization is 500 cal g^-1, the molar entropy of vapourization is