Latent Heat - Example cont.
Since the body generates 200 Watts, or 200 Joules a second, the body must evaporate water to carry this energy away.
Q =(200 J/sec)*(4 hs)*(3600 sec/hr)= 2,880,000 J.
From the previous considerations, evaporating 1 liter of water carries away 2,525,000 J. Thus we need 2.88MJ / (2.525MJ/liter)