Calculate the energy required to vapourise 50g ... - WAEC Physics 2002 Question
Calculate the energy required to vapourise 50g of water initially at 80oC.[specific heat capacity of water = 2260Jg-1K-1][specific latent heat of vaporisation of water = 2260Jg-1]
A
113,000J
B
117,200J
C
234,400J
D
420,000J
correct option: b
mc\(\theta\) + ML = 50 x 4.2 x 20 + 50 x 2260
= 117,200J
= 117,200J
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