JEE Main · 2020 · 09 Jan 2020 · Shift 2 · Chemical Thermodynamics

The true statement amongst the following is:

Answer: (B)

Solution

Entropy

S

is a state property whose value changes with temperature, since adding heat reversibly,

d S = \frac{d q _{r e v}}{T}

, raises the entropy as temperature rises. The change

Δ S

between two states is likewise temperature-dependent, because

Δ S = n C ln \frac{T _{2}}{T _{1}}

depends on the temperatures of the initial and final states. Hence both

S

and

Δ S

are functions of temperature.

JEE Main · 2020 · 09 Jan 2020 · Shift 2 · Single correct option