Waec Model Questions Vol1 2020 Chemistry Question 30

Practice objective / multiple choice question 30 from the 2020 Waec Model Questions Vol1 Chemistry examination.

Waec Model Questions Vol1 2020 Chemistry Objective / Multiple Choice Medium Difficulty
Question 30 WAEC_MODEL_QUESTIONS_VOL1 • 2020 • CHEMISTRY • objective

The enthalpy of vaporisation of water is 40.7 kJ mol⁻¹. At its normal boiling point (100 °C) the vapour pressure is 1 atm. Using the Clausius-Clapeyron equation, estimate the boiling point of water when the external pressure is reduced to 0.5 atm. Give your answer in °C to one decimal place.

Answer Options

A. 78.9 °C
B. 92.1 °C
C. 84.6 °C
Correct Answer D. 81.2 °C
Correct Answer
D
Correct Option:
81.2 °C

About This Question

This is Waec Model Questions Vol1 2020 Chemistry Question 30. It is one of the objective questions from the 2020 Waec Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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