Evaporation of sweat requires energy and thus take excess heat away from the body. Some of the water that you drink may eventually be converted into sweat and evaporate. If you drink a 20-ounce bottle of water (590g) that had been in the refrigerator at 3.8 °C, how much heat is needed to convert all of that water into sweat and then to vapor? (Note: Your body

Chemistry
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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Evaporation of sweat requires energy and thus take
excess heat away from the body. Some of the water
that you drink may eventually be converted into sweat
and evaporate. If you drink a 20-ounce bottle of water
(590g) that had been in the refrigerator at 3.8 °C, how
much heat is needed to convert all of that water into
sweat and then to vapor? (Note: Your body
temperature is 36.6 °C. For the purpose of solving this
problem, assume that the thermal properties of sweat
are the same as for water.
Cs, liquid water
4.184 J/g °C
Cs,
1.84 J/g °C
%3D
steam
Cs, ice = 2.09 J/g °C
%3D
AHvap = 40.67 kJ/mol at 36.6 °C.
AHfus = 6.01 kJ/mol
%3D
1413 kJ
81 kJ
1150 kJ
Transcribed Image Text:Evaporation of sweat requires energy and thus take excess heat away from the body. Some of the water that you drink may eventually be converted into sweat and evaporate. If you drink a 20-ounce bottle of water (590g) that had been in the refrigerator at 3.8 °C, how much heat is needed to convert all of that water into sweat and then to vapor? (Note: Your body temperature is 36.6 °C. For the purpose of solving this problem, assume that the thermal properties of sweat are the same as for water. Cs, liquid water 4.184 J/g °C Cs, 1.84 J/g °C %3D steam Cs, ice = 2.09 J/g °C %3D AHvap = 40.67 kJ/mol at 36.6 °C. AHfus = 6.01 kJ/mol %3D 1413 kJ 81 kJ 1150 kJ
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