What is the effect of temperature on the rate of a chemical reaction according to the Arrhenius equation?
Practice Questions
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Q1
What is the effect of temperature on the rate of a chemical reaction according to the Arrhenius equation?
Rate decreases exponentially with temperature
Rate increases linearly with temperature
Rate increases exponentially with temperature
Rate remains constant regardless of temperature
According to the Arrhenius equation, the rate constant increases exponentially with an increase in temperature, leading to a higher reaction rate.
Questions & Step-by-step Solutions
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Q
Q: What is the effect of temperature on the rate of a chemical reaction according to the Arrhenius equation?
Solution: According to the Arrhenius equation, the rate constant increases exponentially with an increase in temperature, leading to a higher reaction rate.
Steps: 5
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 the 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 an increase in k.
Step 5: A higher rate constant (k) means that the reaction will occur faster, resulting in a higher reaction rate.
