Waec Model Questions Vol1 2021 Chemistry Question 36

Practice objective / multiple choice question 36 from the 2021 Waec Model Questions Vol1 Chemistry examination.

Waec Model Questions Vol1 2021 Chemistry Objective / Multiple Choice Medium Difficulty
Question 36 WAEC_MODEL_QUESTIONS_VOL1 • 2021 • CHEMISTRY • objective

A 150 g sample of a substance has a melting point of 120 °C, a specific heat capacity of 0.5 J g⁻¹ °C⁻¹ in the solid state and 0.8 J g⁻¹ °C⁻¹ in the liquid state, and a latent heat of fusion of 60 J g⁻¹. The sample is initially at 20 °C and is supplied with 12 000 J of heat. Determine the final temperature of the sample and the masses of solid and liquid present at equilibrium.

Answer Options

A. 115 °C; 90 g solid and 60 g liquid
B. 120 °C; 100 g solid and 50 g liquid
Correct Answer C. 120 °C; 75 g solid and 75 g liquid
D. 130 °C; 60 g solid and 90 g liquid
Correct Answer
C
Correct Option:
120 °C; 75 g solid and 75 g liquid

About This Question

This is Waec Model Questions Vol1 2021 Chemistry Question 36. It is one of the objective questions from the 2021 Waec Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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