Introductory Chemistry (5th Edition)

Published by Pearson
ISBN 10: 032191029X
ISBN 13: 978-0-32191-029-5

Chapter 3 - Matter and Energy - Exercises - Cumulative Problems - Page 90: 98

Answer

$2831.378 J $

Work Step by Step

Using the equation $q=mc\Delta T$, we can solve for q which in this case is the heat that is required to heat the aluminum sample from $72^{\circ}F $ to $145^{\circ}F$. The change in temperature can be calculated by taking the final temperature and subtracting it from the initial. Therefore, its $145-72 = 73^{\circ}F$. The heat capacity ("c") of aluminum is $0.902 \frac{J}{g\times^{\circ}C}$ Therefore, $q = 43 g \times 0.902 \frac{J}{g\times^{\circ}C}\times73= 2831.378 J $
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