Waec Model Questions Vol1 2025 Chemistry Question 26
Practice objective / multiple choice question 26 from the 2025 Waec Model Questions Vol1 Chemistry examination.
A 100 g sample of a pure substance is initially at 25 °C. Its melting point is 150 °C, boiling point is 300 °C. Specific heat capacities are 0.5 J g⁻¹ °C⁻¹ (solid) and 0.8 J g⁻¹ °C⁻¹ (liquid). The latent heat of fusion is 60 kJ kg⁻¹ and the latent heat of vaporisation is 200 kJ kg⁻¹. The sample is heated with a total of 30 kJ of energy. After heating, the temperature is 300 °C. How many grams of the substance remain as liquid at this temperature?
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About This Question
This is Waec Model Questions Vol1 2025 Chemistry Question 26. It is one of the objective questions from the 2025 Waec Model Questions Vol1 Chemistry examination.
Difficulty level: Medium .
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