   # Your skin cools as perspiration evaporates. Is the thermal energy change, q . of your body greater than, less than, or equal to zero? (a) q &gt; 0 (b) q &lt; 0 (c) q = 0 ### Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640

#### Solutions

Chapter
Section ### Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640
Chapter 5.1, Problem 2RC
Textbook Problem
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## Your skin cools as perspiration evaporates. Is the thermal energy change, q. of your body greater than, less than, or equal to zero? (a) q > 0 (b) q < 0 (c) q = 0

Interpretation Introduction

Interpretation:

The enthalpy changes ( ΔH=q ) should be identified given the three different statements of human body process.

Concept Introduction:

Enthalpy state function: It explained that there is no non-expansion work on the system and the pressure is still constant then the change in enthalpy will equal the heat consumed or released by the system (q) or  ΔH=q , So this relationship to identify whether a reaction is endothermic or exothermic.

### Explanation of Solution

Let us consider the thermal energy changes

Heat energy required to raise the temperature of 1g of substance by 1k.

Energy gained or lost can be calculated using the below equation.

q=m×C×ΔT

Where, q= energy gained or lost for a given mass of substance (m), C =specific heat capacity,

ΔT = change in temperature.

Perspiration compounds of the evaporative loss are dependent upon the rate at which water is actually evaporated

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