CHĄ(g) + 2 O2(g) AH2 = -607 kJ AH1 = -890 kJ CO(g) + 2 H2O(!) +O2(g) AH3 = -283 kJ CO2(g) + 2 H2O(1) A Figure 5.22 Enthalpy diagram illustrating Hess's law. The net reaction is the same as in Figure 5.21, but here we imagine different reactions in our two-step version. As long as we can write a series of equations, each with a known value of AH, that add up to the equation we need, we can calculate the overall AH. Enthalpy
CHĄ(g) + 2 O2(g) AH2 = -607 kJ AH1 = -890 kJ CO(g) + 2 H2O(!) +O2(g) AH3 = -283 kJ CO2(g) + 2 H2O(1) A Figure 5.22 Enthalpy diagram illustrating Hess's law. The net reaction is the same as in Figure 5.21, but here we imagine different reactions in our two-step version. As long as we can write a series of equations, each with a known value of AH, that add up to the equation we need, we can calculate the overall AH. Enthalpy
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
Related questions
Question
Suppose the overall reaction were
modified to produce 2 H2O(g) rather
than 2 H2O(l). Would any of the values
of ΔH in the diagram stay the same?
Transcribed Image Text:CHĄ(g) + 2 O2(g)
AH2 = -607 kJ
AH1 =
-890 kJ
CO(g) + 2 H2O(!) +O2(g)
AH3 = -283 kJ
CO2(g) + 2 H2O(1)
A Figure 5.22 Enthalpy diagram illustrating Hess's law. The
net reaction is the same as in Figure 5.21, but here we imagine
different reactions in our two-step version. As long as we can write
a series of equations, each with a known value of AH, that add up
to the equation we need, we can calculate the overall AH.
Enthalpy
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