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Lecture 60

CHEM 107 Lecture Notes - Lecture 60: Exothermic Reaction, Endothermic Process, Exothermic ProcessPremium

4 pages97 viewsSpring 2017

Department
Chemistry
Course Code
CHEM 107
Professor
Mallory Monique Mentele
Lecture
60

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5-3-17-Temperature
Wednesday, May 3, 2017
11:00 AM
Changing the Temperature
Exothermic reaction:
A + B←→ C + D + heat
Negative ∆H
Endothermic reaction:
A + B + heat ←→ C + D
Positive ∆H
Increase in temperature (add heat)
Exothermic: equilibrium shifts towards the reactant side
Endothermic: equilibrium shifts towards the product side
Decrease in temperature (remove heat)
Exothermic: equilibrium shifts towards the product side
Endothermic: equilibrium shifts towards reactant side
Volume and Pressure Changes
*Volume and pressure are inversely related
Effects only gas species in equilibrium
Reducing the volume (increasing the pressure) will shift the reaction to the side
with the fewest moles of gas
Increasing the volume (decreasing the pressure) will shift the reaction to the
side with most moles of gas
-If gas coefficients sum up to be the same on both sides of reaction, there is no
effect
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