Thermodynamics Terms

Add the Eqs. (i) and (ii) and subtract E (iii) from them. Hence, the heat of formation of acetylene is + .

(entropy change) is the measure of randomness and thus in solid, liquid and gas, the order of entropy is gas liquid solid Thus, is positive for the reaction

Enthalpy of a compound is equal to its heat of formation.

(A) When , the reaction goes in forward direction, i.e., the reaction is spontaneous. (B) Given, thus, ve and hence, the reaction is non-spontaneous. (C) At equilibrium, (D) or This condition is true for spontaneous endothermic reactions (as