Collision theory | Kinetics | AP Chemistry | Khan Academy

Collision theory states that molecules must collide to react. For most reactions, however, only a small fraction of collisions produce a reaction. In order for a collision to be successful, the reactant molecules must collide both with sufficient energy to overcome the activation energy barrier and in the proper orientation to form any new bonds in the products. View more lessons or practice this subject at www.khanacademy.org/science/a...
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[@smitakumari4302]

For a reaction, specific rate constant at 283 K is 2.5 × 10-6
L mol-1
s
-1 and at 293
K is 4.25 × 10-5
L mol-1 s-1. Compute the energy of activation of the reaction.
Please let me know the solution.... M stuck :(

[@udinpetot87]

The energy states indicate gibbs free energy instead of enthalpy. Hence, the sign of energy change indicates whether the reaction is exergonic or endergonic, not exothermic or endothermic.

[@alesh576]

Finally understood this graph! thanks

[@sinekonata]

To be fully rigorous, if Energy is measured in Joules, what exactly does a kJ/mol measure? Unless the mol is not really a unit and could be omitted, it seems to me that a kJ/mol can't be just "energy" but something else.

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So the proper orientation always depends on the product that you'll be making?

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how does effective collision work in reactions?

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[@infinitygaming4831]

Can u explain me why activation energy Doesn't change with the temperature . I think it must change because at higher temp we need less energy to activate.

[@hanboo7498]

higher temperature means higher energy. The KE of the molecules is directly proportional to the temperature... So the activation energy is basically a specific temperature that a reaction has to reach... since u would reach that level of energy by increasing the temperature

[@naqeebt]

is it always true that both reactants will have the same energy?

[@menemali1]

7:17 , The activation energy of this graph is as you say or it is just the upper part of the energy change ?

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[@aneezazahid7536]

wait!! transition state or activated complex formation is what differs collision theory from transition state theory. but you also included it in collision theory. whyy??? someone please make me understand this. I hate Chemistryyyyy

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