https://www.quora.com/Whats-the-basic-difference-between-entropy-and-enthalpy
https://zh.wikipedia.org/wiki/%E7%84%93
https://zh.wikipedia.org/wiki/%E7%86%B5
H = U + PV
U is the internal energy of the system and P is constant pressure, and V is volume
ΔH = ΔU + PΔV
ΔS = ΔH/T
T is the temperature in °K or °C
Entropy measures the amount of disorder a system undergoes while transferring heat.