Physics (10th Edition)

Published by Wiley
ISBN 10: 1118486897
ISBN 13: 978-1-11848-689-4

Chapter 15 - Thermodynamics - Problems - Page 415: 5

Answer

(a) $+1.2\times10^{5}J$ (b) $5.9\times10^{5}J$

Work Step by Step

Here we use the first law of thermodynamics $Q=\Delta U+W$ to find the solutions. (a) $Q=\Delta U+W=>W=Q-\Delta U$ Let's plug known values into this equation $W=-6.8\times10^{5}J-(-8\times10^{5}J)=+1.2\times10^{5}J$ The work that the first player does before =$+1.2\times10^{5}J$ leaving the game (b) $Q=\Delta U+W$ ; Let's plug known values into this equation. $Q=2.1\times10^{5}J+(-8\times10^{5}J)=-5.9\times10^{5}J$ The magnitude of the heat lost = $5.9\times10^{5}J$
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