What is the effect of temperature on the rate constant of a reaction according t

Practice Questions

Q1
What is the effect of temperature on the rate constant of a reaction according to the Arrhenius equation?
  1. Rate constant decreases with temperature
  2. Rate constant increases with temperature
  3. Rate constant is unaffected by temperature
  4. Rate constant is only affected by activation energy

Questions & Step-by-Step Solutions

What is the effect of temperature on the rate constant of a reaction according to the Arrhenius equation?
  • Step 1: Understand the Arrhenius equation, which is k = A * e^(-Ea/(RT)).
  • Step 2: Identify the variables in the equation: k is the rate constant, A is the pre-exponential factor, Ea is the activation energy, R is the gas constant, and T is the temperature in Kelvin.
  • Step 3: Note that as temperature (T) increases, the value of -Ea/(RT) becomes less negative.
  • Step 4: Realize that when -Ea/(RT) is less negative, e^(-Ea/(RT)) increases.
  • Step 5: Conclude that an increase in e^(-Ea/(RT)) results in a higher rate constant (k).
  • Step 6: Therefore, according to the Arrhenius equation, an increase in temperature generally leads to an increase in the rate constant, k.
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