Given the following standard heats of reactions ) heat of formation of water = - 68.3 kcal i) heat of combustion of acetylene =- 310.6 kcal ii) heat of combusti

Given the following standard heats of reactions ) heat of formation of water = - 68.3 kcal i) heat of combustion of acetylene =- 310.6 kcal ii) heat of combustion of ethylene = - 337.2 kcal Calculate the heat of reaction for the hydrogenation of acetylene at constant volume (25° C) (1984, 4M)