State whether the following are characteristics of zero-, first-, or second-order kinetics for the reaction R ----> P. If there is not enough information given to determine the order of the reaction, indicate so.
Use the following key to indicate your answer:
0 = zero order 1 = first order 2 = second order N/A = insufficient information
(a) ___ The reaction rate is not affected by [R].
(b) ___ A plot of ln[R] vs. time is linear.
(c) ___ The reaction rate increases with increasing temperature.
(d) ___ A catalyst can accelerate the reaction.
(e) ___ A plot of 1/[R] vs. time is linear.
State whether the following are characteristics of zero-, first-, or second-order kinetics for the reaction R ----> P. If there is not enough information given to determine the order of the reaction, indicate so.
Use the following key to indicate your answer:
0 = zero order 1 = first order 2 = second order N/A = insufficient information
(a) ___ The reaction rate is not affected by [R].
(b) ___ A plot of ln[R] vs. time is linear.
(c) ___ The reaction rate increases with increasing temperature.
(d) ___ A catalyst can accelerate the reaction.
(e) ___ A plot of 1/[R] vs. time is linear.
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Related questions
Relating plots to the order of a reaction
Consider the following reaction:
Aâproducts
The plot of [A] versus t is linear for the zero-order reaction, the plot of ln[A]versus t is linear for the first-order reaction, and the plot of 1[A] versus t is linear for the second-order reaction. [A]represents the concentration of the reactant A.
| Reaction order | Linear plot |
| zero | [A] vs. t |
| first | ln[A] vs. t |
| second | 1[A] vs. t |
The linearity of each graph can be used to identify the order of a reaction.
Characteristics of second-order reactions
For a second-order reaction, [A]âproducts, the rate of the reaction is given as rate= k[A]2, where k is the rate constant and [A] is the concentration of reactant A. The integrated rate law for second-order reactions is 1[A]t=kt+1[A]0, where [A]t is the concentration of reactant Aat time t, k is the rate constant, and [A]0 is the initial concentration of reactant A. This equation is of the type y=mx+b. Therefore, the plot of 1[A]tversus time is always a straight line with a slope k and a y intercept 1[A]0.
Consider the second-order reaction: 2HI(g)âH2(g)+I2(g) Use the simulation to find the initial concentration [HI]0 and the rate constant k for the reaction. What will be the concentration of HI after t = 7.05Ã1010 s ([HI]t) for a reaction starting under the condition in the simulation?
