Chemistry: Matter and Change
Chemistry: Matter and Change
1st Edition
ISBN: 9780078746376
Author: Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Publisher: Glencoe/McGraw-Hill School Pub Co
Question
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Chapter 15.4, Problem 32PP
Interpretation Introduction

Interpretation:

The value of ΔΗ is to be calculated for the given equation.

Concept introduction:

The change in enthalpy of a reaction can be calculated using Hess Law.

According to it, if one equation is the resultant of two different equations, then change in enthalpy of the equation is the sum of enthalpy change of both reactions.

Expert Solution & Answer
Check Mark

Answer to Problem 32PP

ΔΗ = 385.4kJ

Explanation of Solution

Given data:

2CO+O22CO2ΔΗ=566kJ

N2+O22NOΔΗ=180.6kJ

Calculation:

Adding the first equation to the reverse of the second equation, the resultant equation is obtained.

2CO+2NO2CO2+N2

Therefore, according to Hess Law,

ΔΗ=566(180.6)

  =385.4kJ

Conclusion

Thus, ΔΗ = 385.4kJ .

Chapter 15 Solutions

Chemistry: Matter and Change

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