1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Latent Heat Problem

  1. Mar 2, 2008 #1
    The question reads:

    During exercise a person may give off 180kcal of heat in 30 min by evapouration of water from the skin. How much water is lost?

    If someone could clearly explain the question that would be great thanks
  2. jcsd
  3. Mar 2, 2008 #2

    Shooting Star

    User Avatar
    Homework Helper

    When water evaporates, a certain amount of heat is needed to transform the water to vapour at the same temperature. The amount of heat necessary per unit mass is called the latent heat of evaporation and is equal to 540 cal/gm.

    When a person sweats, the water evaporates, and the latent heat is supplied by the body of the person, thus cooling the body.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Latent Heat Problem
  1. Latent heat of steam (Replies: 0)

  2. Latent heat (Replies: 1)