Latent heat can not be detected by a thermometer. The mass of water lost is 0.25 g.
The latent heat is the heat that can not be detected by a thermometer but it acts to break the intermolecular bonds in a substance.
Now we know that;
Heat added = 565 * 10^3 J
Heat of vaporization of water = 2,260,000 J/kg
H = mL
m = H/L
m = 565 * 10^3 J/ 2,260,000 J/kg
m = 0.25 g
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