Question

Velocity constant of a reaction at 290 K was found to be \( 3.2 \times 10^{-3} \). At 300 K it will be:

• A. \( 1.28 \times 10^{-3} \)
• B. \( 9.6 \times 10^{-3} \)
• C. \( 6.4 \times 10^{-3} \)
• D. \( 3.2 \times 10^{-4} \)

Hint:

The rate constant increases with temperature according to the Arrhenius equation.

Answer 1

The Correct Option is C

Step 1: Use the Arrhenius equation.
The rate constant depends on temperature as \( k = A e^{-\frac{E_a}{RT}} \).
Step 2: Calculate the rate constant at 300 K.
Using the Arrhenius equation, the rate constant at 300 K is \( 6.4 \times 10^{-3} \). Final Answer: \[ \boxed{6.4 \times 10^{-3}} \]