Question

Consider the following parallel reactions: k1 B A k2 C The activation energies are 45.3 kJ/mol for A?B and 69.8 kJ/mol for A?C. Assume that ?H‡ = Ea and that ?Hº‡ and ?Sº‡ are independent of temperature. a. If the rate constants are equal at 320 K, at what temperature will k1/k2 = 2.00? b. What will [B]/[C] be after 10 seconds? Assume that [B]o=[C]o=0. c. After 100 hours?

          Consider the following parallel reactions:
k1
B
A
k2
C
The activation energies are 45.3 kJ/mol for A?B and 69.8 kJ/mol for A?C.
Assume that ?H‡ = Ea and that ?Hº‡ and ?Sº‡ are independent of temperature.
a. If the rate constants are equal at 320 K, at what temperature will k1/k2 = 2.00?
b. What will [B]/[C] be after 10 seconds? Assume that [B]o=[C]o=0.
c. After 100 hours?

Consider the following parallel reactions:
k1
B
A
k2
C
The activation energies are 45.3 kJ/mol for A?B and 69.8 kJ/mol for A?C.
Assume that ?H‡ = Ea and that ?Hº‡ and ?Sº‡ are independent of temperature.
a. If the rate constants are equal at 320 K, at what temperature will k1/k2 = 2.00?
b. What will [B]/[C] be after 10 seconds? Assume that [B]o=[C]o=0.
c. After 100 hours?

Added by Shawn A.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

Instant Answer

Solved by Expert John Nicolle

Step 1

00, we can use the Arrhenius equation: k = Ae^(-Ea/RT) where k is the rate constant, A is the pre-exponential factor, Ea is the activation energy, R is the gas constant (8.314 J/(mol*K)), and T is the temperature in Kelvin. For the reaction A->B, we have: k1 = Show more…

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Consider the following parallel reactions: k1A->B and k2A->C. The activation energies are 45.3 kJ/mol for A->B and 69.8 kJ/mol for A->C. Assume that Î”H = Ea and that Î”H and Î”S* are independent of temperature. a. If the rate constants are equal at 320 K, at what temperature will k1/k2 = 2.00? b. What will [B]/[C] be after 10 seconds? Assume that [B]o = [C]o = 0. c. After 100 hours?