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Try to create a sample word problem about Hess’s Law. Include your solution following the given steps on the discussion as your guide.

Try to create a sample word problem about Hess’s Law. Include your solution following the given steps on the discussion as your guide.

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Try to create a sample word problem about Hess’s Law. Include your solution
following the given steps on the discussion as your guide.

An analogy for Hess's law is as follows. Suppose you go from the first floor to the sixth floor ofa building by elevator. The gain in your gravitational polential energy (which corresponds to the enthalpy change for the overall process) is the same whether you go directly there or stop at each floor on your way up (breaking the trip into a series of steps). Let's say we are interested in the standard enthalpy of formation of carbon monoxide (CO). We might represent the reaction as: C(graphite) + % Ox(g) CO(g) cannot measure the enthaipy change for C0 drectly as shown Instead, we must
Transcribed Image Text:An analogy for Hess's law is as follows. Suppose you go from the first floor to the sixth floor ofa building by elevator. The gain in your gravitational polential energy (which corresponds to the enthalpy change for the overall process) is the same whether you go directly there or stop at each floor on your way up (breaking the trip into a series of steps). Let's say we are interested in the standard enthalpy of formation of carbon monoxide (CO). We might represent the reaction as: C(graphite) + % Ox(g) CO(g) cannot measure the enthaipy change for C0 drectly as shown Instead, we must
However, buming graphite also produces some carbon dioxide (CO2), so we cannot measure the enthalpy change for CO directly as shown. Instead, we must employ an indirect route, based on Hess's law. It is possible to carry out the following two separate reactions, which do go to completion: Cgnphite) +0g)-→0{g A/ =-M15 Unol (b) First, we reverse Equation (b) to get (e) Because chemical equalions can be added and subtracted just like algebraic equations, we carry out the operation (a) (C) and obtain Clgmphite)+0:g)→COg This, AHY (Co) 105 mol tooking back, we see that the overal reactions.the formaion.of CO. (Equation rai. which can be broken down into two
Transcribed Image Text:However, buming graphite also produces some carbon dioxide (CO2), so we cannot measure the enthalpy change for CO directly as shown. Instead, we must employ an indirect route, based on Hess's law. It is possible to carry out the following two separate reactions, which do go to completion: Cgnphite) +0g)-→0{g A/ =-M15 Unol (b) First, we reverse Equation (b) to get (e) Because chemical equalions can be added and subtracted just like algebraic equations, we carry out the operation (a) (C) and obtain Clgmphite)+0:g)→COg This, AHY (Co) 105 mol tooking back, we see that the overal reactions.the formaion.of CO. (Equation rai. which can be broken down into two
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