Answer: A
δS = δQ/T
Entropy:
It is defined as randomness or disorder of molecular momentum. It is a measures molecular disorder of a system.
It is popularly known as Gibbs entropy, defined by thermodynamics II law.
Where δS = change in entropy
δQ = Heat transfer
= TH-TC
TH = temperature of source (High temperature reservoir)
Tc = temperature of sink (low temperature reservoir)
T = Temperature of source
Entropy is a measure of number of possible microscopic states of a system in thermal equilibrium.
In equation S is the entropy also it is called as statistical entropy or thermodynamic entropy.
