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What is the effect of increasing temperature on the rate of a chemical reaction

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Question: What is the effect of increasing temperature on the rate of a chemical reaction according to the Arrhenius equation?

Options:

  1. Rate decreases
  2. Rate remains constant
  3. Rate increases exponentially
  4. Rate increases linearly

Correct Answer: Rate increases exponentially

Solution: 

According to the Arrhenius equation, an increase in temperature results in an exponential increase in the rate constant, thus increasing the reaction rate.

What is the effect of increasing temperature on the rate of a chemical reaction

Practice Questions

Q1
What is the effect of increasing temperature on the rate of a chemical reaction according to the Arrhenius equation?
  1. Rate decreases
  2. Rate remains constant
  3. Rate increases exponentially
  4. Rate increases linearly

Questions & Step-by-Step Solutions

What is the effect of increasing temperature on the rate of a chemical reaction according to the Arrhenius equation?
  • Step 1: Understand that the Arrhenius equation relates temperature to the rate of a chemical reaction.
  • Step 2: The Arrhenius equation is usually written as k = A * e^(-Ea/(RT)), where 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: Notice that as temperature (T) increases, the value of -Ea/(RT) becomes less negative, which means e^(-Ea/(RT)) increases.
  • Step 4: Since k (the rate constant) is directly proportional to e^(-Ea/(RT)), an increase in temperature leads to a larger value of k.
  • Step 5: A larger rate constant (k) means that the reaction will occur faster, thus increasing the reaction rate.
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