True or False a. Because the Arrhenius equation contains the gas constant R, the

ID: 975346 • Letter: T

Question

True or False

a. Because the Arrhenius equation contains the gas constant R, the Arrhenius equation applies only to gas phase reactions.

b. The Arrhenius equation holds exactly.

c. The pre-exponential factor A has the same units for all reactions.

d. The half-life is independent of the initial concentration only for first – order reactions.

e. Changing the temperature changes the rate constant.

f. If the partial orders differ from the coefficients of the balanced chemical reaction, then the reaction must be composite.

g. If the partial orders are the same as the coefficients of the balanced chemical reaction, then the reaction must be simple.

h. For a reaction with Ea > 0, the greater the activation energy, the more rapidly the reaction increases with temperature.

i. The presence of a homogeneous catalyst cannot change the equilibrium composition of the system.

j. Since the concentration of reactants decrease with time, the rate of reaction always decreases with time.

k. Apparent activation energies are never negative.

Any answeres appreciated

a) False-R is just a constant as other constants,as it was dertermined in relation with gas constant.

C) False-expo depend upon the type of reaction.

d) True

e)True-temperature and the rate const are directly proportional.

F)True

g)true

h)true

i)True-catalyst cannot change the equilibrium const,but homogeneous can.

j)True-more the reactant at the initial stage so faster the rate of reaction.it will slow down as the reactant gets into the product.

k)true

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.