Physical Chemistry - Exam 2 Statements

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9 Terms

1
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Le’ Chatelier Principle

If a system at equilibrium is disturbed, it shifts to counteract the change.

2
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Overall order of a reaction

Sum of the exponents in the rate law, indicating the reaction's dependence on reactant concentrations.

<p>Sum of the exponents in the rate law, indicating the reaction's dependence on reactant concentrations.</p>
3
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Transition state theory

Reactions pass through a high-energy transition state before forming products.

<p>Reactions pass through a high-energy transition state before forming products.</p>
4
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Activation energy

The minimum energy required for a reaction to occur.

<p>The minimum energy required for a reaction to occur.</p>
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Potential energy surface

Graph showing how potential energy changes with atomic or molecular positions during a reaction.

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Stead-state approximation

Assumes the concentration of intermediates remains constant during a reaction.

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Arrhenius equation

Describes how the rate constant depends on temperature and activation energy.

<p>Describes how the rate constant depends on temperature and activation energy.</p>
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Half-life of a reaction

Time taken for half of the reactants to be converted into products.

<p>Time taken for half of the reactants to be converted into products.</p>
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Mean free path

Average distance a molecule travels before colliding with another.

<p>Average distance a molecule travels before colliding with another.</p>