Question

Explain what do you understand by enthalpy driven and entropy driven reactions?

Answer 1

Entropy:

Degree of disorder or measurement of randomness of a system. It is an “extensive property” and state function.

$\Delta S\quad =\quad \frac { q }{ t }$

Enthalpy:

Enthalpy is defined as the sum of the energy stored in the system and the energy used in doing work.

Reactions can be “driven by enthalpy” reactions are extremely exothermic reactions and it have negative $\Delta H$ and the entropy of the reaction also decreases.

Reactions can be “driven by entropy” reactions are extremely endothermic reactions and it have positive $\Delta H$.