Find out the heat of formation of `CH_3COOH`. Given that the heat of combusion of `CH_3COOH` is -867 KJ `mol^-1` and the heat of formation of `CO_2` and `H_2O` are - 393.5 and - 285.9 KJ `mol^-1` respectively.

Find out the heat of formation of CH_(3)CO OH . Given that the heat of Combustion of CH_(3)CO OH is -867 " kJ mol"^(-1) and the heat of formation of CO_(2) and H_(2)O are -393.5 and -285.9 " kJ mol"^(-1) respectively.

Calculate the standard enthalpy of formation of n- butane. Given : standard enthalpy of combustion of n- butane, C (graphite) and H_(2)(g) " are " -2878.5 " kJ mol"^(-1), -393.5 " kJ mol"^(-1) and -285.8 " kJ mol"^(-1) respectively.

At STP if latent heat of fusion of ice is 6 kJ * mol^(-1) , then find out the entropy change of fusion of ice .

The standard entropy change Delta S_r^@ for CH_(4(g)) + 2O_(2(g)) to CO_(2(g)) + 2H_2O_((l)) is -242.98 JK^(-1) at 25^@C . Calculate the standard reaction enthalpy for the above reaction if standard Gibbs energy of formation of CH_(4(g)), CO_(2(g)) and H_2O_((l)) are -50.72, -394.36 and - 237.13 kJ mol^(-1) respectively.

H_(2)O(l) to H_(2)(g)+(1)/(2)O_(2)(g) Does the above reaction occur spontaneously at 298 K ? Given that standard enthalpy of formation of water = -285.83 " kJ mol"^(-1) , standard entropy of H_(2)(g), O_(2)(g) and H_(2)O(l) are 130.57, 205.04 and 69.95 J. K^(-1). " mol"^(-1) respectively.

Calculate the standard enthalpy of reaction at 25^@C temperature for the following reaction : C_6H_6(I) + frac 15/2 O_2 (g) rarr 6CO_2(g)+3H_2O(I) . Given: The standard enthalpy of formation of C_6H_6(I) , .CO_2(g) and H_2O(I) are 49.0kJ mol^-1 , -393.5 kJ mol^-1 and -285.8 kJ mol^-1 respectively.

Heat of formation of CO_2, H_2O & CH_4 are - 100 cal, -50 cal &- 70 cal . Find heat of combustion of CH_4 .

To decompose 9 gm water, requires 142.5 kJ heat the heat of formation of water is

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: