Sulfur Trioxide Can Undergo Decomposition According to the Equation 2SO₃

question 13

Multiple Choice

Sulfur trioxide can undergo decomposition according to the equation 2SO₃ → 2SO₂ + O₂
For this reaction, rate = -0.5Δ[SO₃ ]/Δt = k[SO₃]². If the reaction rate is 1.75 × 10^-7 mol L^-1 min^-1 when the concentration of sulfur trioxide is 5.4 × 10^-3 mol L^-1, what is the value of the rate constant k?

• A) 3.2 × 10^-5 L mol^-1 min^-1
• B) 1.6 × 10^-5 L mol^-1 min^-1
• C) 6.0 × 10^-3 L mol^-1 min^-1
• D) 3.0 × 10^-3 L mol^-1 min^-1
• E) 1.6 × 10^-2 L mol^-1 min^-1

---

Definitions:

Spontaneous Recovery

The reappearance of a learned response after its apparent extinction, often occurring in the absence of further conditioning.

Acquisition

The process of gaining a new skill, knowledge, behavior, or object through experience, practice, or the act of obtaining.

Conditioned Response

A learned response to a previously neutral stimulus that has become associated with an unconditioned stimulus.

Extinction

In psychology, the diminishing of a conditioned response when the reinforcement is withheld or the stimulus is repeatedly presented without the unconditioned stimulus.