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# Arrhenius equation watch

1. I'm *really* confused about this! I keep finding different forms of it and I'm not sure which one to use.
My teacher gave us ln(rate) = constant -Ea/RT

In the Nuffield chemistry book (I'm doing the nuffield course) it says lnk = constant - Ea/R.1/T

I don't understand the difference, or what the constant is. What is the difference between lnk and ln(rate)?
2. (Original post by Environmentalist)
I'm *really* confused about this! I keep finding different forms of it and I'm not sure which one to use.
My teacher gave us ln(rate) = constant -Ea/RT

In the Nuffield chemistry book (I'm doing the nuffield course) it says lnk = constant - Ea/R.1/T

I don't understand the difference, or what the constant is. What is the difference between lnk and ln(rate)?
They are using the letter k to mean the rate. It's called the rate constant and it gives you an idea of how the fast the reaction goes.

-Ea/RT is the same as (-Ea/R).(1/T) where the dot is a multiplication sign. You're multiplying two fractions: numerator by numberator, and denominator by denominator.

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Updated: April 10, 2006
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