Question

Suppose an endothermic reaction has a positive change in entropy greater than the heat absorbed. What can be said about the spontaneity of this reaction?

Answer 1

If the entropy is greater than the enthalpy, it will have more spontinaity

Answer 2

Explanation:

Since the given reaction is endothermic, therefore value of $\Delta H$ is positive. Also, it is given that value of $\Delta S$ is positive, that is, there will be increase in entropy.

Hence, relation between spontaneity and entropy is as follows.

              $Delta G = \Delta H - T \Delta S$

                                   = +ve - (+ve. +ve)

                                   = +ve - ve

                                   = -ve

Therefore, we can conclude that there will be increase in spontaneity of the said reaction.