The enthalpy change (∆H) for the reaction
                
is -92.38 kJ at 298 K. what is the  at 298 K?

∆U^⊝ of combustion of methane is –X kJ mol^–1. The value of ∆H^⊝ is :

(i) = ∆U^⊝

(ii) > ∆U^⊝

(iii) < ∆U^⊝

(iv)  = 0

What do you understand by:
(i) Heat capacity of a substance
(ii) Heat capacity at constant volume
(iii) Heat capacity at constant pressure?

166. Suppose a piece of metal requires 6.80J of heat to raise the temperature by one degree Celsius at constant volume. Calculate the quantity of heat required to raise the temperature of a piece of metal from 20.0°C to 30.0°C.

What do you understand by: (i) Specific heat capacity (ii) Molar heat capacity?

60.8 J of energy is required to change the temperature of 25.0 g of ethylene glycol (a compound used as an antifreeze in automobile engines) by 1.0 K. Calculate heat capacity of ethylene glycol.