ASU - CHM 116 (Cabirac) - Exam 1 with|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
answers
What is meant by the term "reaction rate?" - CORRECT ANSWERS
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✔✔The change in amount of products or reactants in a given
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
amount of time; the speed of a chemical reaction.
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What factors affect the rate of a chemical reaction? - CORRECT
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ANSWERS ✔✔The concentration of the reactants, physical state |\ |\ |\ |\ |\ |\ |\ |\
of the reactants, temperature, and presence of a catalyst
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Is the rate of disappearance of reactants always the same as the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
rate of appearance of products? - CORRECT ANSWERS ✔✔No,
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because stoichiometry must be known to relate the two
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A + B --> C
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Rate = k[B]^2 |\ |\
What are the reaction orders for A and B and the overall reaction
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order? What are the units of the rate constant? - CORRECT
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ANSWERS ✔✔A = zero order |\ |\ |\ |\
B = second order
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Overall = second order |\ |\ |\
M^(-1)*s^(-1)
What quantity, when graphed versus time, will yield a straight
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
line for a first-order reaction? - CORRECT ANSWERS ✔✔ln[A]
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, How can you calculate the rate constant for a first-order
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
reaction? - CORRECT ANSWERS ✔✔On a graph of ln[A] versus
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
time, k is the (-slope of the straight line
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How do you find how much a concentration remains after n half-
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
lives? - CORRECT ANSWERS ✔✔[A] = [A]0/2^n
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For a generic second-order reaction A --> B, what quantity, when
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
graphed versus time, will yield a straight line? What is the slope
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
of the straight line? - CORRECT ANSWERS ✔✔1/[A]
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k
What is meant by the term elementary reaction? - CORRECT
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ANSWERS ✔✔A process that occurs in a single event; the order is
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
given by the coefficients in the balanced equation for the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
reaction
What is a unimolecular reaction? - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\
✔✔Involves one reactant molecule; the activated complex is |\ |\ |\ |\ |\ |\ |\ |\
derived from a single molecule |\ |\ |\ |\
What is a bimolecular reaction? - CORRECT ANSWERS ✔✔Involves
|\ |\ |\ |\ |\ |\ |\ |\
two reactant molecules in the activated complex and the overall
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
process
answers
What is meant by the term "reaction rate?" - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔The change in amount of products or reactants in a given
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
amount of time; the speed of a chemical reaction.
|\ |\ |\ |\ |\ |\ |\ |\
What factors affect the rate of a chemical reaction? - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔The concentration of the reactants, physical state |\ |\ |\ |\ |\ |\ |\ |\
of the reactants, temperature, and presence of a catalyst
|\ |\ |\ |\ |\ |\ |\ |\
Is the rate of disappearance of reactants always the same as the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
rate of appearance of products? - CORRECT ANSWERS ✔✔No,
|\ |\ |\ |\ |\ |\ |\ |\ |\
because stoichiometry must be known to relate the two
|\ |\ |\ |\ |\ |\ |\ |\
A + B --> C
|\ |\ |\ |\
Rate = k[B]^2 |\ |\
What are the reaction orders for A and B and the overall reaction
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
order? What are the units of the rate constant? - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔A = zero order |\ |\ |\ |\
B = second order
|\ |\ |\
Overall = second order |\ |\ |\
M^(-1)*s^(-1)
What quantity, when graphed versus time, will yield a straight
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
line for a first-order reaction? - CORRECT ANSWERS ✔✔ln[A]
|\ |\ |\ |\ |\ |\ |\ |\
, How can you calculate the rate constant for a first-order
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
reaction? - CORRECT ANSWERS ✔✔On a graph of ln[A] versus
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
time, k is the (-slope of the straight line
|\ |\ |\ |\ |\ |\ |\ |\
How do you find how much a concentration remains after n half-
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
lives? - CORRECT ANSWERS ✔✔[A] = [A]0/2^n
|\ |\ |\ |\ |\ |\
For a generic second-order reaction A --> B, what quantity, when
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
graphed versus time, will yield a straight line? What is the slope
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
of the straight line? - CORRECT ANSWERS ✔✔1/[A]
|\ |\ |\ |\ |\ |\ |\
k
What is meant by the term elementary reaction? - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔A process that occurs in a single event; the order is
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
given by the coefficients in the balanced equation for the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
reaction
What is a unimolecular reaction? - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\
✔✔Involves one reactant molecule; the activated complex is |\ |\ |\ |\ |\ |\ |\ |\
derived from a single molecule |\ |\ |\ |\
What is a bimolecular reaction? - CORRECT ANSWERS ✔✔Involves
|\ |\ |\ |\ |\ |\ |\ |\
two reactant molecules in the activated complex and the overall
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
process
