Heat of Combustion of benzene and acetylene is given as delta`H_1` and delta`H_2` What is the expression for DeltaH when acetylene is isomerise to benzene

The heat of combustion at constant volume at 27^(@)C of benzene and acetylene are -800 kcal and 310 kcal . Find the heat of polymerisation of acetylene to benzene at constant pressure.

Assertion : For the combustion of methane, DeltaE gt DeltaH . Reason : DeltaH is related to DeltaE by the expression, DeltaH = DeltaE + Deltan_(g)RT

In the combusion of 2g benzene, 2.5 kcal heat was evolved. What is the heat of combustion?

Heat of combustion of benzene is 718 K. cals. When 39 gms of benzene undergoes combustion, the heat liberated is

Given the following standard heats of reactions: (a) heta of formation of water = -68.3 kcal , (b) heat of combustion of C_(2)H_(2) =- 310.6 kcal , (c ) heat of combustion of ethylene =- 337.2 kcal . Calculate the heat of reaction for the hydrogenation of acetylene at constant volume and at 25^(@)C .

The difference in Delta H and Delta E for the combustion of methane at 25^(@)C would be :-

Enthalpy of hydrogenation of benzene is DeltaH_(1) and for cyclohexene is DeltaH_(2) . The resonance energy of benzene is