List of practice Questions

Reversible expansion of an ideal gas under isothermal and adiabatic conditions are as shown in the figure. AB $\rightarrow$ Isothermal expansion AC $\rightarrow$ Adiabatic expansion Which of the following options is not correct ?

The efficiency of an ideal heat engine working between the freezing point and boiling point of water, is

The correct thermodynamic conditions for the spontaneous reaction at all temperatures is

The efficiency of a fuel cell is given by