Calculate the energy required to vapourize 50g of water initially at 80°C.[specific heat capacity of water = 2260Jg‾¹K‾¹] [specific latent heat of vaporization of water = 2260Jg‾¹]

A. 113,000J
B. 117,200J
C. 234,400J
D. 420,000J

Correct Answer: Option B

B. 117,200J

Explanation

mcθ + ML = 50 x 4.2 x 20 + 50 x 2260

= 117,200J