Problem 2
The addition of a catalyst increases the rate of the reaction but not the equilibrium constant. True/False
Problem 3
For a reaction with a larger \(\Delta G\) compared to a reaction with a smaller \(\Delta G\), a. The reaction with the larger \(\Delta G\) is always the faster reaction. b. The reaction with the larger \(\Delta G\) is always the slower reaction. c. The two rates are equal. d. It is impossible to decide which reaction is faster.
Problem 5
The most basic step used to describe a reaction process is: a. The transition state. b. An elementary reaction. c. A unimolecular reaction. d. The steady state. e. The equilibrium rate.
Problem 6
The probability of a bimolecular reaction occurring is related to the rate of collisions between the two species of molecules. True/False
Problem 10
The rate constant for a -order elementary reaction is \(\mathrm{M}^{-1} \cdot \mathrm{Sec}^{-1}\).
Problem 12
Catalysts can work by changing the reaction mechanism, or Quantitative/Essay
Problem 15
Iodine-123 is important for medical imaging studies and follows first-order decay kinetics. A \(15-\mu \mathrm{g}\) sample of I-123 has decayed to \(7.5 \mu \mathrm{g}\) after 13 hours. After how much time will it decay to only \(1.5 \mu \mathrm{g}\) ?
Problem 16
A reaction is half complete after 20 minutes. After 40 minutes the reaction is two-thirds complete. When will the reaction be \(90 \%\) complete?
Problem 17
A protein (P) can either fold properly into the native state \((N)\) or aggregate into a misfolded form (A). Both processes obey first-order kinetics. The branching ratio ([N]/[A]) is 9 and the effective rate constant, \(k_{\text {eff, }}\) is 15 \(\mathrm{sec}^{-1}\). What is the rate constant for native state folding?
Problem 18
Upon excitation, a modified green fluorescent protein emits photons that yield an initial intensity of 10,000 units in the fluorimeter. After 2 nanoseconds, the signal has decayed to 300 units. If the rate constant for fluorescent production of light \(\left(k_{f}\right)\) is \(0.1 \mathrm{nsec}^{-1}\), what are the values of the rate constant for heat production \(\left(k_{h}\right)\) and the fluorescence lifetime \(\left(\tau_{f}\right)\) ?
