Enthalpies of solution of `(BaCl_2).(2H_2O)` and `BaCl_2` are 8.8 and `(-20.6)Kj mol^(-1)` respectively calculate the heat of hydration of for conversion of `BaCl_2` to `(BaCl_2).(2H_2O)`

Standard heat of formation of C_2H_6(g),CO_2(g) and H_2O(l) are -21.1,-94.1 and -68.3 Kcal mol^(-1) respectively calculate standard heat of combustion of C_2H_6(g)

The standard heat of formation of NO_2(g) and N_2O_4(g) are 8.0 and 2.0 kcal mol^-1 respectively. The heat of dimarization of NO_2 in kcal is:

The enthalpy of solution of BaCl_2(s) and BaCl_2.2H_2O(s) are -20.6 kJ mol^-1 and 8.8kJ mol^-1 . The enthalpy change for the formation of hydrated salt is

The heat of reaction for the following reaction (DeltaH^(0)) at 25^(@)C temperatue is -1368 kJ: C_(2)H_(5)OH(l)+3O_(2)(g) to 2CO_(2)(g)+3H_(2)O(l) If the enthalpy of formation of CO_(2)(g) and H_(2)O(l) at 25^(@)C are -393.5 and -285.8 kJ*mol^(-1) respectively, then what will be the value of the standard enthalpy of formation of C_(2)H_(5)OH(l) ?

Al(s) and Fe(s) are oxidised by oxygen to form Al_(2)O_(3)(s) and Fe_(2)O_(3)(s) respectively. If the standard enthalpy of formation of Al_(2)O_(3)(s) and Fe_(2)O_(3)(s) are -1669.8 " kJ mol"^(-1) and -824.2 " kJ mol"^(-1) respectively, calculate the change in enthalpy of the given reaction : 2Al(s)+Fe_(2)O_(3)(s) to 2Fe(s)+Al_(2)O_(3)(s)

At 25^(@)C and 1 atm, heat of formation of C_(2)H_(4) (g), CO_(2)(g) and H_(2)O(l) are 52 " kJ mol"^(-1), -394 " kJ mol"^(-1) and -286 " kJ mol"^(-1) respectively. Calculate the heat of combustion of C_(2)H_(4)(g) .

The enthalpies of formation of C_2H_2(g) and C_6H_6(g) at 298 K are 230 and 85 kJ/mol respectively. The enthalpy change for the reaction 3C_2H_2(g) to C_6H_6(g) is

The standard heat of formation of C_6 H_5 COOH (s) CO_2 (g) & H_2 O (1) at 300K are -408, - 393, & -286 Kj mol^-1 respectively. Calculate the heat of Combustion of Benzoic acid.

Standard enthalpy of combustion of CH_(4)(g) " is " 802.8 " kJ mol"^(-1) . If the bond dissociation energies of C-H, O=O and O-H bonds are 416.2, 493.7 and 464.4 " kJ mol"^(-1) respectively then calculate the bond dissociation energy of C=O bond.