The enthalpy of combustion of `CH_4` at `25^@C` is 890kJ. How much heat liberated when 3.2g of methane is burnt in air ?

The heat of combustion of methane is, -880kJ mol^-1 . If 3.2 g of methane is burnt:

Given enthalpy of formation of CO_2(g) and CaO(s) are -94.0 kJ and -152 kJ respectively and the enthalpy of the reaction, CaCO_3(s)rarrCaO(s) + CO_2(g) is 42 kJ. The enthalpy of formation of CaCO_3(s) is:

How much heat is needed to take 5g of ice at 0^@C to water at 10^@C ?

The heat of combustion of C_10H_8(s) at constant volume is -5133kJ mol_-1 at 298K. Calculate the value of enthalpy change. (R=8.314 JK_-1 mol_-1)

The enthalpy of formation of ammonia is -46.0kJ mol^-1. The enthalpy change for the reaction, 2NH_3(g)rarrN_2(g)+3H_2(g) is:

The enthalpies of formation of N_2O and NO are 28 and 90 kJ mol^-1 respectively. The enthalpy of the reactioin, 2N_2O(g)+O_2(g)rarr4NO(g) is equal to:

How much heat is required to convert 1 g of ice at 0^@C to water at 100^@C ?

A glass window pane 1 m by 1 m is 25 mm thick. If the show outside maintains the outer surface at 0^@ C and the heat of the room maintains the inner surface at 6^@ C ,Thermal conductivity of glass in S.I unit is 0.2, how much heat will be conducted through the glass in 1 day ?

The heat of combustion for C ,H_2 and CH_4 are-349.0, -241.8 and -906.7 kJ respectively.The heat of formation CH_4 is:

The heat of formation of methane C(s)+2H_2(g)rarrCH_4(g) at constant is 18500 cal at 25^@C . The heat of reaction at constant volume would be: