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Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: aaazureee on October 10, 2015, 11:54:27 AM

Title: Reaction kinetics question?
Post by: aaazureee on October 10, 2015, 11:54:27 AM

The following reaction is first order with respect to [P] and zero order with respect to [Q].
P + Q →products
If the rate constant doubles for each 10oC rise in temperature, which of the following sets of conditions will give the greatest rate of reaction?
A. [P] = 0.1, [Q] = 0.2, T = 40(°C)
B. [P] = 0.1, [Q] = 0.3, T = 30(°C)
C. [P] = 0.2, [Q] = 0.2, T = 30(°C)
D. [P] = 0.3, [Q] = 0.1, T = 20(°C)
E. [P] = 0.3, [Q] = 0.1, T = 30(°C)

So i have figure out that rate =k[P] but i cant work out the latter part of the problem

Title: Re: Reaction kinetics question?
Post by: aaazureee on October 12, 2015, 11:04:27 AM

Can someone please help me solve this problem?

Title: Re: Reaction kinetics question?
Post by: sjb on October 12, 2015, 11:10:04 AM

Compare each in turn.

How fast is condition A, compared to B? to C (perhaps break this into 2 steps, [P] = 0.2, [Q] = 0.2, T = 40(°C), then [P] = 0.2, [Q] = 0.2, T = 30(°C)?)..