This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Latent heat of vaporization of water at 100⁰C is 2,260 kJ/kg 

So the amount of heat required to convert water at 100⁰C to steam at the same temperature = mass * Latent heat = 4 * 2,260 kJ = 9,040 kilo Joules

1 5 1
Q=ML Where m=mass=4kg,L=latent heat of vapourisation=2260KJ/Kgthen Qthe quantity of heat liberated=4 x2260=9040KJ