PhysicsChange of stateWAEC
Find the heat needed to change 2 kg of water at 100 °C to steam. (Specific latent heat = 2.26 × 10⁶ J/kg)
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Answer: A. 4.52 × 10⁶ J
Q = mL = 2 × 2.26 × 10⁶ = 4.52 × 10⁶ J.
An AdmitMe practice question, written for the WAEC syllabus. Not an official past question.