Paper: CSIR-NET December 2015 · Subject: Physical Chemistry · Chapter: Thermodynamics · Topic: Thermodynamics – General · Marks: 2 · Difficulty: Medium
The temperature-dependence of the vapour pressure of solid A can be represented by $\log \mathrm{p}=10.0-\frac{1800}{\mathrm{T}}$, and that of liquid A by $\log \mathrm{p}=8.0=-1400 / \mathrm{T}$. The temperature of the triplepoint of A is
(a)200 K
(b)300 K
(c)400 K
(d)500 K
Answer
Answer: A ✓ checked by 4AB · confidence high
Explanation
10.0 − 1800/T = 8.0 − 1400/T ⇒ 400/T = 2 ⇒ T = 200 K.