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Quiz 2 Prep

Posted: Sun Feb 26, 2017 10:40 pm
by AsthaPatel4B
For number 10 in quiz prep 2 in the course reader, can somebody explain to me why the answer is false?

Number 11 states, "The rate constant for the reaction A->B is 25 min^-1 at 298K and 35 min^-1 at 350 K. Calculate the value of the rate constant at 770K. Give your answer in min^-1. What formula would I refer to for this problem? How would I start it off?

Thank you :)

Re: Quiz 2 Prep

Posted: Sun Feb 26, 2017 11:12 pm
by Brandon N 3A
For number 10, you know the reaction is second order from the given rate equation, so you use the second order integrated rate law to solve for t for both concentrations. The answer comes out to be 1/k for the first set of concentrations (1.0 to 0.50M) and 2/k for the second set (0.50 to 0.25). The two t's are not equal and therefore it is false.