Given the thermochemical equations X, + 3 Y, → 2XY, ΔΗ = -390 kJ - X, + 2Z, – 2 XZ, AH2 = -120 kJ %3D 2 Y, + Z, → 2 Y,Z AH3 = -240 kJ Calculate the change in enthalpy for the reaction. 4XY, + 7Z, - 6 Y,Z + 4 XZ, ΔΗ=

Given the thermochemical equations X, + 3 Y, → 2XY, ΔΗ = -390 kJ - X, + 2Z, – 2 XZ, AH2 = -120 kJ %3D 2 Y, + Z, → 2 Y,Z AH3 = -240 kJ Calculate the change in enthalpy for the reaction. 4XY, + 7Z, - 6 Y,Z + 4 XZ, ΔΗ=

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter4: Energy And Chemical Reactions

Section: Chapter Questions

Problem 99QRT

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Question

Given the thermochemical equations
X, + 3 Y, → 2XY3
ΔΗ
= -390 kJ
-
X, + 2Z, → 2 XZ,
AH2 = -120 kJ
%3D
2 Y, + Z, → 2 Y,Z
AH3 = -240 kJ
Calculate the change in enthalpy for the reaction.
4 XY, + 7Z, –→ 6 Y,Z + 4 XZ,
ΔΗ

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