Calculate the heat energy required to vapourize 50g of water initially at 80oC if the specific heat capacity of water is 4.2Jg-1K (specific latent heat of vapourization of water is 2260Jg-1).

Calculate the heat energy required to vapourize 50g of water initially at 80oC if the specific heat capacity of water is 4.2Jg-1K (specific latent heat of vapourization of water is 2260Jg-1).

Calculate the heat energy required to vapourize 50g of water initially at 80^oC if the specific heat capacity of water is 4.2Jg^-1K (specific latent heat of vapourization of water is 2260Jg^-1).

A 533000J
B 230000J
C 117200J
D 113000J
E 4200J

waec 1989 physics

The correct answer is C. 117200J

Q = McÎÎ¸ + ml

Q = {50 x 4.2 x (100 - 80) + 50 x 2260} 117200J.

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