Kinetics

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305113590
Posts: 66
Joined: Fri Sep 28, 2018 12:28 am

Kinetics

Postby 305113590 » Sun Mar 03, 2019 5:19 pm

Why is it that we need to know derivatives and slopes at particular points in kinetics? Are those values calculated or more theoretical?

105114680
Posts: 60
Joined: Fri Sep 28, 2018 12:23 am

Re: Kinetics

Postby 105114680 » Sun Mar 03, 2019 6:07 pm

In a concentration vs time graph of a reaction, the slope or derivative at a certain time is the rate of the reaction (how fast or slow a reaction proceeds), and kinetics is the study of the rates of chemical reactions. Initial rates of reactions can be calculated but it becomes more difficult the farther along you are in a reaction because some product formed returns to reactant and the reverse reaction must be taken into account. That is why we study the initial rate of a reaction, before much product is formed.

Anjali_Kumar1F
Posts: 62
Joined: Fri Sep 28, 2018 12:25 am

Re: Kinetics

Postby Anjali_Kumar1F » Sun Mar 03, 2019 6:19 pm

What does it mean if Kinetics is controlling a reaction?

Jacob Bershatski 4C
Posts: 30
Joined: Fri Sep 28, 2018 12:21 am

Re: Kinetics

Postby Jacob Bershatski 4C » Sun Mar 03, 2019 11:25 pm

I think we need to know derivatives for kinetics because we need to be able to calculate the instantaneous rate of change of concentration in a reaction.

Jonny Schindler 1A
Posts: 30
Joined: Fri Sep 28, 2018 12:20 am

Re: Kinetics

Postby Jonny Schindler 1A » Mon Mar 04, 2019 3:31 pm

if a reaction is thermodynamically favorable doesn't occur because of kinetics, it is a kinetics controlled reaction.

taryn_baldus2E
Posts: 62
Joined: Fri Sep 28, 2018 12:24 am

Re: Kinetics

Postby taryn_baldus2E » Mon Mar 04, 2019 5:10 pm

A reaction is controlled by kinetics when it has a very high activation energy and therefore, despite being thermodynamically favorable, it does not occur.

Mindy Kim 4C
Posts: 65
Joined: Fri Sep 28, 2018 12:25 am

Re: Kinetics

Postby Mindy Kim 4C » Mon Mar 04, 2019 6:29 pm

In the example Dr. Lavelle used in lecture, a reaction can be favorable but be very slow. In this case, kinetics rather than thermodynamics is controlling the reaction.

Jordan Lo 2A
Posts: 85
Joined: Fri Sep 28, 2018 12:25 am

Re: Kinetics

Postby Jordan Lo 2A » Mon Mar 04, 2019 8:04 pm

Will we be performing calculations where we find the derivatives?


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