Chemistry 9th Edition

Published by Cengage Learning
ISBN 10: 1133611095
ISBN 13: 978-1-13361-109-7

Chapter 6 - Thermochemistry - Exercises: 69

Answer

$-220.8\text{ kJ}$

Work Step by Step

$C_{(s)}+O_{2(g)}\Rightarrow CO_{2(g)}$ -397.3 kJ/mol Carbon $2CO_{2(g)}\Rightarrow 2CO_{(g)}+O_{2(g)}$ 283.3 kJ/mol CO Therefore, $2C_{(s)}+2O_{2(g)}\Rightarrow 2CO_{2(g)}$ + $2CO_{2(g)}\Rightarrow 2CO_{(g)}+O_{2(g)}$= $2C_{(s)}+O_{2(g)}\Rightarrow 2CO_{(g)}$ and the enthalpy of the reaction is: $2*(-393.7)+566.6=-220.8\text{ kJ}$
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