Study the following therochemical equations:
`{:(A,rarr,B,,,Delta H = + 100 Kcal,),(B,rarr,C,,,Delta H = -80 K cal,):}`
The correct order of enthapies of formation of A, B and C is

N_(2) + 3H_(2) rarr 2NH_(3), Delta H = - 46K . Cals. From the above reaction, heat of formation of ammonia is

C+O_(2)rarr CO_(2), Delta H = -94 K.cal, CO+(1)/(2)O_(2) rarr CO_(2), Delta H = -67.7 K.cal . On the basis of the above data, the heat of formation of 'CO' is

Considering the following reactions, C+(1//2)O_2 rarr CO, Delta H =- 26.4 kcal H_2 + (1//2) O_2 rarr H_2O_((l)) , Delta H =-57.8 kcal Delta H for the reaction. H_2O+ C rarr H_2 + CO is

A rarr B, Delta H = 4 kcal mol^(-1), DeltaS = 10 cal mol^(-1) K^(-1) . Reaction Is spontaneous when temperature is :

Given the following information (i) A+B to C+D , Delta H=-10.0 kcal (ii) C+D to E , Delta H=15.0 kcal Then, Delta H for A+B to E will be ______ .

Given the following information (i) A+B to C+D , Delta H=-10.0 kcal (ii) C+D to E , Delta H=15.0 kcal Then, Delta H for A+B to E will be ______ .

The reaction A rarr B has Delta H = -10 kcal and E_a = 30 kcal . Find Ea^1 for the reverse reaction.