Question

For a process, entropy change of a system is expressed as ________.

Options

• H-TS

• `"q"_"rev"/"T"`

• `"T"/"q"_"rev"`

• q_rev × T

Answer 1

For a process, entropy change of a system is expressed as `underline("q"_"rev"/"T")`.

Explanation:

For an isothermal reversible process, let the system absorbs q amount of heat from surroundings at temperature T. Thus, the entropy change of the system will be `Delta "S"_"system" = "q"_"rev"/"T"`.