Ex. 11. given the following standard heats of reaction at constant pressure: i) heat of formation of water =- 68-3 kcal (ii) heat of combustion of acetylene =-3

Ex. 11. Given the following standard heats of reaction at constant pressure: i) Heat of formation of water =- 68-3 kcal (ii) Heat of combustion of acetylene =-310-6 kcal H CH (ii) Heat of combustion of ethylene = -3372 kcal H, Calculate the heat of reaction for the hydrogenation of acetylene at constant volume (25°C).