Label each statement as True or False. For false answers, cross out what is false and...

Label each statement as True or False. For false answers, cross out what is false and correct the statement so that it is true.

T or F

a.Reactions are faster at a higher temperature because activation energies are lower.
b.It is possible to change the rate constant by changing the temperature.
c.Catalyzed and uncatalyzed reactions have identical mechanisms.
d.Rates increase with increasing concentration of reactants because there are more collisions between reactant molecules.
e.As a reaction proceeds at constant temperature, the rate of the reaction -[R]/t remains constant.

Expert Solution

a.Reactions are faster at a higher temperature because activation energies are lower.	False, typically, Ea is considered constant under temperature ranges... Then, this is mainly because of more kinetic collisions
b.It is possible to change the rate constant by changing the temperature.	True, rate constant "k" changes according to K = -A*exp(-Ea/(RT)) chang ein T change K
c.Catalyzed and uncatalyzed reactions have identical mechanisms.	FALSE, catalyzed reactions have much more efficient reaction mechanism, therefore, rate is higher
d.Rates increase with increasing concentration of reactants because there are more collisions between reactant molecules.	True, more collissions, more favorable reactions
e.As a reaction proceeds at constant temperature, the rate of the reaction -[R]/t remains constant.	Depends on rate of reaction, if Zero order, this is true, otherwise false

queen_honey_blossom answered 2 years ago

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