CHEM113, Fall 2014 – Exam 1A September 18, 2014
Name______________________________
Please mark your exam type (i.e. A or B) on the scantron and write in your student ID
number. Please mark all answers clearly on the provided scantron form. You may wish to
circle your selected answer on this exam (which you may take with you) so that you can compare
your answers with the answers posted on RamCT. There are 25 questions; it is to your
advantage to answer all of them. Each correct answer is worth 4 points.
1.Which of the following statements regarding reaction rates and kinetic molecular theory is
NOT true?
a) Higher concentrations of reactants typically lead to greater reaction rates because of an
increase in the number of effective collisions.
b) The actual dependence on reaction rate on concentration must be determined
experimentally because it depends on the reaction mechanism.
c) At t = 0 the maximum rate is usually observed because only reactant molecules are
present.
d) Collisions between product molecules that reform reactant molecules do not affect the
overall rate of the reaction.
e) As the reaction proceeds, the concentrations of reactants decreases and the rate decreases.
2. The rate of a reaction is found to quadruple when the concentration of both reactants is
doubled, the order of the reaction with respect to each reactant is ___________.
a) first, first
b) second, zero
c) zero, second
d) a and b only
e) all of the above
3. The linear form of the Arrhenius equation is very useful as it allows us to calculate the
___________ from the slope and the _____________ from the y-intercept.
a) frequency factor, activations energy
b) initial concentration, activation energy
c) activation energy, frequency factor
d) activation energy, Boltzmann constant
e) transition state, steric factor
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