Waec Model Questions Vol1 2020 Chemistry Question 6

Practice objective / multiple choice question 6 from the 2020 Waec Model Questions Vol1 Chemistry examination.

Waec Model Questions Vol1 2020 Chemistry Objective / Multiple Choice Medium Difficulty
Question 6 WAEC_MODEL_QUESTIONS_VOL1 • 2020 • CHEMISTRY • objective

A 2.0 mol sample of water at 25 °C is heated with 5.0 kJ of energy. The specific heat capacity of liquid water is 4.18 J g⁻¹ K⁻¹, the molar mass of water is 18 g mol⁻¹ and the latent heat of vaporisation is 2260 J g⁻¹. Determine the final state of the water (liquid, mixture of liquid and vapour, or vapour) and its final temperature (to the nearest °C).

Answer Options

A. Mixture of liquid and vapour at approximately 100 °C
Correct Answer B. Liquid water at approximately 58 °C
C. Vapour at approximately 120 °C
D. Liquid water at approximately 45 °C
Correct Answer
B
Correct Option:
Liquid water at approximately 58 °C

About This Question

This is Waec Model Questions Vol1 2020 Chemistry Question 6. It is a objective / multiple choice question from the 2020 Waec Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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