Chemistry: The Central Science (13th Edition)

Published by Prentice Hall
ISBN 10: 0321910419
ISBN 13: 978-0-32191-041-7

Chapter 5 - Thermochemistry - Exercises: 5.45b

Answer

-4.11 kJ

Work Step by Step

According to the equation, the production of one mole of AgCl releases 65.5 kJ of Heat. To find how much is released by 9g, we must convert the 9g into moles. First we must find the molecular mass of AgCl. Ag has a mass of 107.8082 g/mol and Cl has a mass of 35.45 g/mol. Therefore, AgCl has a mass of 143.2582 g/mol Then to convert 9g to moles: 9g * ( 1mol/143.2582g) = 0.0628 mol, which would be 0.0628 * -65.5 kJ = -4.11 kJ
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