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Topic: Heat of Reaction  (Read 2896 times)

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Offline wanabBScN

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Heat of Reaction
« on: May 04, 2010, 10:45:04 AM »
For the reaction CO+ NO2→ CO2+ NO the activation energy for the forward reaction is 135kJ/mol of CO reacted.

How do I determine the heat of reaction?
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Offline Borek

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Re: Heat of Reaction
« Reply #1 on: May 04, 2010, 10:48:18 AM »
Activation energy is unrelated to the reaction heat.
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Offline wanabBScN

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Re: Heat of Reaction
« Reply #2 on: May 04, 2010, 11:19:30 AM »
This is what I have come up with:

  CO=NO2→ CO2+NO
Heat of reaction= (CO2+NO)-(CO+NO2)
                      = (-110.5+33.1)- (-393.5+90.29)
                      = -77.4 + -303.21
                      = -380.61

Am I correct?
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Offline wanabBScN

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Re: Heat of Reaction
« Reply #3 on: May 04, 2010, 11:27:42 AM »
 CO=NO2→ CO2+NO
Heat of reaction= (CO2+NO)-(CO+NO2)
                      = (-110.5+33.1)- (-393.5+90.29)
                      = -77.4 - -303.21
                      =-225.8

I had a positive where I needed a negative. Is this equation correct?
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