Q cal of heat is required to raise the temperature of I mole of a monatomic gas from ${\text{20}}^{\mathrm{o}}\mathrm{C} \mathrm{to} {30}^{\mathrm{o}}\mathrm{C}$ at constant pressure. The amount of heat required to raise the temperature of I mole of diatomic gas from ${20}^0\mathrm{C} \mathrm{to} {25}^0\mathrm{C}$ at constant pressure is: