1. When the concentration of a substance is tripled, what effect does it have on the rate if the order with respect to the reactant is : a) 0 b) 1 c) 2 d) 3 e) 1/2 This question has 5 separate answers.

answer to d is 3³ = 27 times faster 

2. The rate constant of a reaction is 0.00065 /hr. What is the half life?

3. The half life a first order reaction is 345 seconds. What is the rate constant including the unit?

4. How long would it take a compound with a first order rate constant of 4.5x10^-4 hr^-1 to decompose to 1% of it original concentration? answer 1.16 years.

5. If the bond of a molecule lies on the x axis, overlap of two p_x orbitals produces a _____ bond.

a) ionic b) delta c) pi d) sigma e) banana

6. Sketch the energy profile for a reaction with an activation energy of 70 kJ and an enthalpy of reaction that is endothermic by 20 kJ. Indicate the position of the activated complex.

7. If k = 0.075 /sec at 100 C and 4.5 /s at 200 C , what would the energy of activation of the reaction?

 answer =60 kJ/mol

8. 14.22

9. What are 3 common mistakes that could probably be made by students in doing the calculation of problem 7 above.

10.  Make up your own problem that is the reverse of  #1  above and answer it.