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Question
Biology
Posted 2 months ago
explain how activation energy determines the rate of the reaction, and give an example of a source of activation wnergy
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Answer from Sia
Posted 2 months ago
Sure, let's break down the concept of activation energy and its role in determining the rate of a reaction, along with an example of a source of activation energy.

Answer
Activation energy is the minimum amount of energy required for a chemical reaction to occur. It determines the rate of the reaction by influencing the number of molecules that have enough energy to react when they collide.
Solution
a
Activation energy (EaE_a) is the energy barrier that reactants must overcome to form products. It is represented in the Arrhenius equation: k=AeEaRTk = A e^{-\frac{E_a}{RT}}, where kk is the rate constant, AA is the pre-exponential factor, RR is the gas constant, and TT is the temperature in Kelvin
b
The rate of a reaction increases with a decrease in activation energy because more molecules have sufficient energy to overcome the energy barrier. Conversely, a higher activation energy means fewer molecules can react, slowing the reaction rate
c
An example of a source of activation energy is heat. When a substance is heated, the kinetic energy of its molecules increases, making it more likely that they will collide with enough energy to overcome the activation energy barrier and react
Key Concept
Activation energy is the minimum energy required for a reaction to occur.
Explanation
The rate of a reaction depends on the number of molecules that can overcome the activation energy barrier. Heat is a common source of activation energy that increases molecular kinetic energy, facilitating reactions.

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