S C Kheterpal, S N Dhawan and, P N Kapil Solutions for Chapter: Thermodynamics, Exercise 3: PROBLEMS FOR PRACTICE

It is required to raise the temperature of water of a swimming pool from $20°\mathrm{C}$ to $25°\mathrm{C}$. The pool holds ${10}^5 \mathrm{L}$ of water. How much energy in joules will be required? Given that the specific heat of water is $4.184 \mathrm{J} {\mathrm{K}}^{-1}{\mathrm{g}}^{-1}$.

Specific heat of an elementary gas is found to be $0.313 \mathrm{J}$ at constant volume. If the molar mass of the gas is $40 \mathrm{g} {\mathrm{mol}}^{-1}$, what is the atomicity of the gas?