Answered: Energy lost as both heat and work…

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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Question

If the battery is defined as the system,
what is the sign on w in part (b)?▲ Figure 5.10 Internal energy is a state
function, but heat and work are not. (a) A
battery shorted out by a wire loses energy to
the surroundings only as heat; no work is
performed. (b) A battery discharged through
a motor loses energy as work (to make the
fan turn) and also loses some energy as heat.
The value of ΔE is the same for both
processes even though the values of q and w
in (a) are different from those in (b).

Energy lost as both heat and work
Energy lost only as heat
ell
(a)
(b)
Charged battery
Heat
Energy
AE lost by
battery
Heat
Work
Discharged battery

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