Question

What does entropy mean in thermodynamics?

Answer 1

Entropy:

• "It can be defined as a measure of the degree of randomness or disorder in the system."
• It can be represented by the symbol, $\mathrm{S}$.
• If randomness in a system is high, then the value of entropy for that system will also be high.

Second Law of Thermodynamics:

• Entropy can be understood with the help of the second law of thermodynamics.
• We know that for an isolated system, the change in energy remains constant.
• Therefore, an increase in entropy in such systems is the natural direction of a spontaneous change.