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ln(k2/k1)=(-delta H/R)(1/T2 - 1/T1)

Posted: Mon Feb 25, 2019 11:51 pm
by Emmaraf 1K
We learned this equation in class but to calculate K when not at 25 degrees C yet it's not on our formula sheet. Will it be on the test and if so how would it show up/would we have to memorize it?

Re: ln(k2/k1)=(-delta H/R)(1/T2 - 1/T1)

Posted: Tue Feb 26, 2019 12:02 am
by Shubham Rai 2C
This is a derived equation from the formula of delta G (standard) = -RTlnK where you solve for K for two different T value. You have to combine the two different T equations to find the equation ln(k2/k1)=(-delta H/R)(1/T2 - 1/T1). So technically it is on the equation sheet, but you can memorize it to not have to go through these steps.

Re: ln(k2/k1)=(-delta H/R)(1/T2 - 1/T1)

Posted: Tue Feb 26, 2019 4:41 pm
by Jonny Schindler 1A
Can anyone provide an example of using this equation?

Re: ln(k2/k1)=(-delta H/R)(1/T2 - 1/T1)

Posted: Tue Feb 26, 2019 4:43 pm
by Selina Bellin 2B
memorize it and understand where it comes from, but i believe it's also on the test's formula page