Determine `Delta_rH` of the reaction
`C_2H_6to C_2H_4+H_2`

The following are the heats of reactions - (i) Delta H_(f)^(@) of H_(2)O_((l))=-68.3 "K cal mol"^(-1) (ii) Delta H_("comb.")^(@) of C_(2)H_(2)=-337.2 "K cal mol"^(-1) (iii) Delta H_("comb.")^(@) of C_(2)H_(4)=-363.7 "K cal mol"^(-1) Then heat change for the reaction C_(2)H_(2)+H_(2)rarr C_(2)H_(4) is -

Calorific value of ethane, in k J/g if for the reaction 2C_(2)H_(6) + 7O_(2) rightarrow 4CO_(2) + 6 H_(2)O, Delta H = -745.6 kcal

Equivalent mass of the reaction C_(6)H_(5)NO_(2)rarr C_(6)H_(5)NH_(2) .

At 27^(@) C , the combustion of ethane takes place according to the reaction C_(2) H_(6)(g) + 7/2O_(2)(g) rightarrow 2CO_(3)(g) + 3H_(2)O(l) Delta E - Delta H for this reaction at 27^(@)C will be