Question

Which law states that the entropy of the universe is always increasing?

Answer 1

Second law of thermodynamics states entropy of the universe is always increasing. entropy always increases in a spontaneous process .

option B) second law of thermodynamics

for example if we keep a hot cup of coffee the heat is lost to surrounding and entropy( randomness increases) since it is a natural process entropy of universe increases.

Answer 2

Answer:

b. second law of thermodynamics  

Explanation:

Entropy (S) is a measure of the extent of disorder or randomness of a system. Greater the disorder, higher (more positive) will be the entropy.

According to the second law of thermodynamics the energy of an isolated system always increases and evolves towards thermal equilibrium. Since the universe is essentially an isolated system, it implies that the entropy of the universe is always increasing.

The change in entropy (ΔS) is given in terms of the ratio of thermal energy of the system (q) and temperature (T). SI unit is J/K

$\Delta S=\frac{q}{T}$