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Questions and Answers
Increasing ______ of reactants leads to an increase in the reaction rate.
Increasing ______ of reactants leads to an increase in the reaction rate.
concentration
Physical and chemical changes require the transfer of ______ energy.
Physical and chemical changes require the transfer of ______ energy.
kinetic
Greater surface area allows particles to collide with many more particles per unit of ______.
Greater surface area allows particles to collide with many more particles per unit of ______.
time
Increasing ______ generally increases the reaction rate.
Increasing ______ generally increases the reaction rate.
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The ______ series provides insight into how readily different metals and non-metals react.
The ______ series provides insight into how readily different metals and non-metals react.
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For every 10K increase in temperature, the reaction rate is ______.
For every 10K increase in temperature, the reaction rate is ______.
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According to the collision theory, when concentrations are increased, collisions occur more ______.
According to the collision theory, when concentrations are increased, collisions occur more ______.
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The Maxwell-Boltzmann energy distribution curve illustrates that most particles have ______ energies.
The Maxwell-Boltzmann energy distribution curve illustrates that most particles have ______ energies.
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Study Notes
Factors Affecting Chemical Reaction Rates
- Chemical reactions have different rates, influenced by various factors.
- Increasing reactant concentration increases reaction rate.
- More reactant particles mean more frequent collisions, leading to a faster reaction.
- Collision theory explains this.
- Increasing surface area of a reactant speeds up the reaction.
Surface Area and Reaction Rates
- For the same mass, more small particles have a larger surface area.
- This increases the number of particles available for collisions per unit of time, therefore, increasing the reaction rate.
Temperature and Reaction Rates
- Increasing temperature generally increases reaction rate.
- Collision theory: Higher temperatures give particles more kinetic energy, leading to more frequent and energetic collisions, thus a faster reaction.
- For every 10 K increase in temperature, reaction rate approximately doubles.
Catalysts and Inhibitors
- A catalyst increases a reaction rate without being consumed in the reaction.
- A catalyst lowers the activation energy, enabling more collisions to breach the energy barrier and speed up the reaction.
- An inhibitor slows or stops a reaction.
- Preservatives are an example of inhibitors.
Maxwell-Boltzmann Energy Distribution Curve
- Particle energy distribution is not uniform.
- Some particles have low energy, while a few have high energy.
- Most particles have intermediate energy levels.
- The average energy is not the same as the most probable energy.
Reactivity Series for Metals and Nonmetals
- Some substances react more readily than others.
- Reactivity series lists metals (and some nonmetals) in order of decreasing reactivity.
- Substances higher on the list are more reactive than those lower on the list.
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Description
Test your understanding of the factors that affect chemical reaction rates. This quiz covers topics such as concentration, surface area, temperature, and the role of catalysts and inhibitors. See how well you grasp the principles of collision theory and its application in reaction kinetics.
