Evaporation of sweat requires energy and thus take excess heat away from the body. Some of the water you drink may eventually be converted into sweat and evaporate. If you drink a 20-ounce/590 mL, bottle of water that had been in the refrigerator at 3.8 °C, how much heat is needed to convert all that water into sweat and then to vapor? (Note: Your body temperature is 36.6 °C. For the purpose of solving this problem, assume the thermal properties of sweat are the same as for water.)
Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
Evaporation of sweat requires energy and thus take excess heat away from the body. Some of the water you drink may eventually be converted into sweat and evaporate. If you drink a 20-ounce/590 mL, bottle of water that had been in the refrigerator at 3.8 °C, how much heat is needed to convert all that water into sweat and then to vapor? (Note: Your body temperature is 36.6 °C. For the purpose of solving this problem, assume the thermal properties of sweat are the same as for water.)
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