Answer :

kvnmurty
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


jamunajohn88
Q=ML Where m=mass=4kg,L=latent heat of vapourisation=2260KJ/Kgthen Qthe quantity of heat liberated=4 x2260=9040KJ

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