7)When you jog, most of the food energy you burn above your
basal metabolic rate (BMR) ends up as internal energy that would
raise your body temperature if it were not eliminated. The
evaporation of perspiration is the primary mechanism for
eliminating this energy. Determine the amount of water you lose to
evaporation when running for 38 minutes at a rate that uses 400
kcal/h above your BMR. (That amount is often considered to be the
"maximum fat-burning" energy output. The latent heat of
vaporization of water at room temperature is
2.5 106 J/kg.)
kg
The metabolism of 1 gram of fat generates approximately 8.96 kcal
of energy and produces approximately 1 gram of water. (The hydrogen
atoms in the fat molecule are transferred to oxygen to form water.)
What fraction of your need for water will be provided by fat
metabolism?
%
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