For the liquid vapour equilibrium of a substance d P/d T at 1 bar and 400 K is 8 10-3 bar K-1. If the molar volume in the vapour form is 200\,L\,mol-1 and the molar volume in the liquid form is negligible, the molar enthalpy of vapourisation is (1.0 bar L = 100 J)

ABC26PH0226 · Thermodynamics

Subject: Physical Chemistry · Chapter: Thermodynamics · Topic: Laws State Functions · Exam: CSIR-NET DEC 2011 · Marks: 2 · Difficulty: Medium

For the liquid $\rightleftharpoons$ vapour equilibrium of a substance $\frac{d P}{d T}$ at 1 bar and 400 K is $8 \times 10^{-3}$ bar $\mathrm{K}^{-1}$. If the molar volume in the vapour form is $200\,\mathrm{L\,mol}^{-1}$ and the molar volume in the liquid form is negligible, the molar enthalpy of vapourisation is (1.0 bar L = 100 J)

(a)$640\mathrm{kJmol}^{-1}$

(b)$100\mathrm{kJmol}^{-1}$

(c)$80\mathrm{kJmol}^{-1}$

(d)$64 \mathrm{kJmol}^{-1}$

Answer

Answer (as printed): D

Explanation

No explanation was printed for this question.

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