0.3 g of ethane undergoes combustion at $$27°C$$ in a bomb calorimeter. The temperature of calorimeter system (including the water) is found to rise by $$0.5°C$$. The heat evolved during combustion of ethane at constant pressure is ______ $$\text{kJmol}^{-1}$$.
(Nearest integer)
[Given : The heat capacity of the calorimeter system is $$20 \text{ kJ K}^{-1}$$, $$R = 8.3 \text{ JK}^{-1} \text{ mol}^{-1}$$. Atomic mass of C and H are 12 and 1 $$\text{g mol}^{-1}$$ respectively]