JEE Main 2022 · 30 Jul · Shift 2 · Chemistry Q33

ChemistrySingle correct+4 / -1Question 33 of 90

Which of the following is the plot of Gibb's free energy (G) vs temperature (T), at constant pressure, for a pure substance?

G falls linearly as T increases

G rises linearly with T, starting above the origin

G rises linearly from the origin

G is constant with T

Answer and worked solution

Official answer: A

Slope. $\left(\dfrac{\partial G}{\partial T}\right)_P=-S<0$ , so G falls as T rises.

(A)

Topics:Gibbs energy and spontaneity

JEE Main 2022 · 30 Jul · Shift 2, Chemistry question 33