K value at a specific temp

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Goyama_2A
Posts: 107
Joined: Sat Aug 24, 2019 12:17 am

K value at a specific temp

Postby Goyama_2A » Mon Jan 20, 2020 1:49 pm

In the “skills you have mastered” section of 5J, it says we should be able to predict the value of K at one temperature from its value at another temperature. Lavelle excluded part of this section from the assigned reading, but I just wanted to make sure. Should we be able to do this? Have we addressed it at all in lecture?

Amy Kumar 1I
Posts: 114
Joined: Thu Jul 11, 2019 12:15 am

Re: K value at a specific temp

Postby Amy Kumar 1I » Mon Jan 20, 2020 2:00 pm

The basic idea is that K values change based on the temperature.

AKatukota
Posts: 100
Joined: Thu Jul 25, 2019 12:18 am

Activity

Postby AKatukota » Mon Jan 20, 2020 2:33 pm

What should we know about the activity of a reaction?

Robin Cadd 1D
Posts: 113
Joined: Thu Jul 11, 2019 12:16 am

Re: Activity

Postby Robin Cadd 1D » Mon Jan 20, 2020 4:02 pm

AKatukota wrote:What should we know about the activity of a reaction?

We talk about activities when we talk about K. When we use partial pressures and concentrations to calculate K, we're actually using approximations. In reality, K is calculated by using activities.

ayushibanerjee06
Posts: 177
Joined: Thu Jul 11, 2019 12:16 am
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Re: K value at a specific temp

Postby ayushibanerjee06 » Mon Jan 20, 2020 8:32 pm

When the temperature is increased, K is higher. When the temperature is decreased, K is lower.

Leonardo Le Merle 1D
Posts: 56
Joined: Wed Feb 27, 2019 12:16 am

Re: K value at a specific temp

Postby Leonardo Le Merle 1D » Tue Jan 21, 2020 3:33 pm

Depending on the type of reaction (endothermic or exothermic), temperature affects K differently, increasing it for endothermic ones and decreasing it for exothermic ones.

Jasmine Vallarta 2L
Posts: 102
Joined: Sat Aug 17, 2019 12:18 am

Re: K value at a specific temp

Postby Jasmine Vallarta 2L » Tue Jan 21, 2020 5:36 pm

we only have to predict the K value at a temperature change for exo/endothermic reactions. That's all that was covered in lecture


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