Identify each of the following energy exchanges as primarily heat or work and determine whether the sign of AU is positive or negative for the system. a. Sweat evaporates from skin, cooling the skin. (The evaporating sweat is the system.) b. A balloon expands against an external pressure. (The contents of the balloon is the system.) c. An aqueous chemical reaction mixture is warmed with an external flame. (The reaction mixture is the system.)
Identify each of the following energy exchanges as primarily heat or work and determine whether the sign of AU is positive or negative for the system. a. Sweat evaporates from skin, cooling the skin. (The evaporating sweat is the system.) b. A balloon expands against an external pressure. (The contents of the balloon is the system.) c. An aqueous chemical reaction mixture is warmed with an external flame. (The reaction mixture is the system.)
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Transcribed Image Text:Identify each of the following energy exchanges as
primarily heat or work and determine whether the
sign of AU is positive or negative for the system.
a. Sweat evaporates from skin, cooling the skin.
(The evaporating sweat is the system.)
b. A balloon expands against an external pressure.
(The contents of the balloon is the system.)
c. An aqueous chemical reaction mixture is warmed
with an external flame. (The reaction mixture is the
system.)
Transcribed Image Text:Identify energy exchanges as primarily heat or work.
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(a)
(b)
| (c)
heat
work
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Determine whether the sign of AU is positive or negative for the system.
Drag the items into the appropriate bins.
Reset
Help
(a)
(b)
(c)
positive
negative
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