question_answer

Predict whether following reaction will be exothermic or endothermic. Give reason for your answer \[H-H(g)+Cl-Cl(g)\xrightarrow{{}}\,2\,H-Cl\,(g)\]

Answer:

                This reaction is accompanied by decrease of randomness, i.e., this factor opposes the process. For the reaction to be spontaneous, the energy factor must favour, i.e., the reaction should be exothermic.