Chemistry question help

I am struggling with thi Screenshot 2021-05-07 181241.png

s question. My answer was +901564 kJ mol-1. I think this is incorrect and would really appreciate some help for clarity. Thanks

(edited 2 years ago)

Original post by chemhelpthanks

I am struggling with thi Screenshot 2021-05-07 181241.png

s question. My answer was +901564 kJ mol-1. I think this is incorrect and would really appreciate some help for clarity. Thanks

Your answer cannot be correct ... it is too large by far.

Activation energy is usually of the order of 10 - 100 kJ

Original post by chemhelpthanks

I am struggling with thi Screenshot 2021-05-07 181241.png

s question. My answer was +901564 kJ mol-1. I think this is incorrect and would really appreciate some help for clarity. Thanks

k2/k1 = 3.27
ln3.27 = 1.178
1.178 * R = 9.79

1/T2-1/T1 = -9.02 x 10-5
9.79/9.02 x 10-5 = 108.5 kJ

Your answer cannot be correct ... it is too large by far.

Activation energy is usually of the order of 10 - 100 kJ

I thought so too. I am really stuck to be honest.

k2/k1 = 3.27
ln3.27 = 1.178
1.178 * R = 9.79

1/T2-1/T1 = -9.02 x 10-5
9.79/9.02 x 10-5 = 108.5 kJ

Right. I missed the step where you had to multiply ln3.27 by R. I did it later on and it threw off the calculation. Thanks a lot!

@charco Whilst you are here, please could you assist me with this question in another post as noone has responded. Thanks.

here's the link: https://www.thestudentroom.co.uk/showthread.php?t=7017354&p=95145518#post95145518

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