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GS Free Sample Test Section III Question 16

GS Free Sample Test Section III Question 16

Postby viv.goldstandard » Fri Sep 04, 2020 1:33 am

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Re: GS Free Sample Test Section III Question 16

Postby sahar85ihs7898 » Sun Feb 27, 2022 2:42 pm

I think lnK is directly proportional to 1/T. I don't understand how lnK= lnA + -Ea/RT changes to
lnK= -Ea/R(1/T) +lnA. How does Ea/RT become Ea/R(1/T)??
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Re: GS Free Sample Test Section III Question 16

Postby goldstanda3269 » Mon Feb 28, 2022 2:10 am

sahar85ihs7898 wrote:I think lnK is directly proportional to 1/T. I don't understand how lnK= lnA + -Ea/RT changes to
lnK= -Ea/R(1/T) +lnA. How does Ea/RT become Ea/R(1/T)??


Manipulating fractions and variables represent a common GAMSAT Section 3 question-type.

Ea/RT can be written in many equivalent ways:

Ea/RT = Ea (1/RT) = Ea/R (1/T)

If you are unsure, you can also replace the 3 variables with numbers and you will have the same answer.

Keep in mind that the reason for expressing the relationship as "-Ea/R (1/T)" is that the graph has 1/T on the x-axis so it is necessary to find 1/T in the original equation provided.
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