WAEC Physics 2018 Theory — Question 16

Question 16 of 27 from the West African Examinations Council (WAEC) Physics 2018 Theory paper, with the correct answer and a full explanation.

9.(c) Explain the statement: The specific latent heat of vaporization of mercury is 2.72×10⁵J/kg.

Model answer

This means that 2.72×10⁵ joules of heat energy are required to change 1kg of mercury from liquid to vapour at its boiling point without any change in temperature.

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