Neco Model Questions Vol1 2017 Chemistry Question 8

Practice objective / multiple choice question 8 from the 2017 Neco Model Questions Vol1 Chemistry examination.

Neco Model Questions Vol1 2017 Chemistry Objective / Multiple Choice Medium Difficulty
Question 8 NECO_MODEL_QUESTIONS_VOL1 • 2017 • CHEMISTRY • objective

At 350\,K, the coexistence line between liquid and vapour of a certain substance has a slope \(\frac{dP}{dT}=0.013\,\text{atm·K}^{-1}\). The molar volume of the vapour at this temperature is 24.5\,L·mol^{-1}, while the liquid molar volume is negligible. Using the Clapeyron equation, calculate the enthalpy of vapourisation \(\Delta H_{vap}\) (in kJ·mol^{-1}) at 350\,K.

Answer Options

A. 9.8 kJ·mol^{-1}
B. 12.5 kJ·mol^{-1}
Correct Answer C. 11.3 kJ·mol^{-1}
D. 10.2 kJ·mol^{-1}
Correct Answer
C
Correct Option:
11.3 kJ·mol^{-1}

About This Question

This is Neco Model Questions Vol1 2017 Chemistry Question 8. It is one of the objective questions from the 2017 Neco Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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