Question

physics During exercise, a person may give off 753,480 J of heat in 30 minutes by evaporation of water from the skin. How much water has been lost?

Answer 1

Answer : The amount of water lost was, 333.4 grams.

Explanation : Given,

Heat released = 753480 J

Formula used :

`Q=mL`

where,

Q = heat released = 753480 J

m = mass = ?

L = latent heat vaporization of water =
`2260J/g`

Now put all the given values in the above formula, we get:

`753480J=m* (2260J/g)`

`m=333.4g`

Thus, the amount of water lost was, 333.4 grams.