Okay, so today in class we were given a hand out "Chemical Kinetics - Reaction Coordinate Diagrams" it basically defines the meaning of both Exothermic and Endothermic reactions.
Exothermic Reaction - In an exothermic reaction, the products possess less energy than the reactants. Also, during an exothermic reaction, heat is lost from the system and the change in heat is a negative value.
Endothermic Reaction - In an endothermic reaction, the product possess more potential energy than the reactants. This energy is absorbed from the surroundings, which increases the systems energy content. Which leads us to having a positive number when changing of heat.
Okay, now for the assignments. Just last week, we were given a yellow booklet which consisted of Kinetic Assignments 1 through 5. We were given a few minutes in class to complete assignment 2 numbers 1-3. Afterwards, we went over them.
Answers to Kinetics Assignment #2
1a. Activation Energy: 25kJ
b. Hproduct - Hreactant
35kJ - 20 kJ = +15kJ
c. This is an endothermic reaction
2a. Activation Energy: -150kJ
b. 25kJ - 100kJ = -75kJ
c. This is an exothermic reaction
d. Reverse reaction: 250kJ - 25kJ = +225kJ
3a. Activation Energy: 10kJ
b. 15kJ - 35kJ = -20kJ
c. This is an exothermic reaction
d. Reverse reaction: 45kJ - 15 kJ = +30kJ
Thats pretty much all we've done so far in the booklet.
Kay, so she also gave us a hand out of reaction rates. So just work on it.
Other then that, if you haven't completed the Kinetics Assignment (graphing) given out yesterday in class, please have it done as soon as possible.
Okay, so that's all for now. The next blogger will be yhO-eE
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1 comment:
What about that awesome demonstration, Elephant's toothpaste, which showed the effect of a catalyst on a reaction?
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