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Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425

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BuyFindarrow_forward

Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425
Textbook Problem
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It has been determined that the body can generate 5500 kJ of energy during one hour of strenuous exercise. Perspiration is the body’s mechanism for eliminating this heat. How many grams and how many liters of water would have to be evaporated through perspiration to rid the body of the heat generated during two hours of exercise? (The heat of vaporization of water is 40.6 kJ/mol.)

Interpretation Introduction

Interpretation:

Amount of water in grams and liter should be found which need to be removed as perspiration after two hours of exercise.

Concept Introduction:

Vaporization of water is an endothermic process that is heat is absorbed which reduces the temperature of our body.

Explanation

Amount of heat energy generated in 2h of exercise is 5500×2

kJ =11000 kJ

Heat of vaporization of water is 40.6

kJ/mol

Amount of water need to be removed as perspiration is total heat produced after 2h of exercise/heat of vaporization of water

=1100040

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