Question

Can total entropy be negative?

Answer 1

Entropy:

1. Entropy is the measure of the randomness or disorderliness of a system.
2. A change in entropy of a system is the amount of heat emitted or absorbed isothermally or reversibly divided by temperature i.e $∆s=\frac{q_1+q_2}{T_1+T_2}$.
3. If the amount of heat emitted is more than the heat absorbed then the total entropy is negative.
4. So total entropy can be negative and in negative entropy a reaction becomes non-spontaneous.