Answer:
56
Explanation:
1 mole of gas at STP occupies 22.4 L of the gas
2.5 mole of the gas at STP occupies 22.4×2.5 L of the gas
so 2.5 mole of the gas at STP occupies 56 L of the gas .
Heat=mass* change in temperature * specific heat
specific heat= 62.4/(.0191*13.9)
=235.037 J/kgK