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Calculate the heat energy required to vaporize 50g of wat...

Calculate the heat energy required to vaporize 50g of water initially at 80ºC if the specific heat capacity of water is 4.23jg1k1 (specific latent heat of vaporization of water is 2260jg1

A.

530000J

B.

23200J

C.

17200J

D.

130000J

Correct answer is D

H = mcθ + mL

H = ?

m = 50g, c = 4.23J/gk,L = 2260, θ = 80ºC

H = 50 [4.23 x 80 + 2260]

= 129920 130,000J