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C6: Quiz 1 – Answers
C6: Quiz 1 – Answers
1)
a) The three factors are:
2) A greater temperature gives the particles more kinetic energy. This means that the particles move around faster, which leads to more frequent collisions, thus increasing the rate of reaction. Also, as the particles have more energy due to the higher temperature, more energy will be transferred during a collision between the particles. This greater energy transferred between the particles during a collision is more likely to satisfy the activation energy, thus resulting in a reaction taking place. So, a greater temperature increases the rate of reaction
3) A greater concentration means that there are more particles in a given volume; the particles are closer together. This means that there will be more frequent collisions and therefore a greater rate of reaction
4) A greater surface area to volume ratio means that there is a greater surface area on the reactants for the particles to collide upon. This will result in more frequent collisions and therefore a greater rate of reaction
5) Activation energy is the minimum amount of energy that is required to start a reaction
a) The three factors are:
- temperature
- concentration or pressure
- surface area to volume ratio
- the frequency of collisions
- the energy transferred in a collision
2) A greater temperature gives the particles more kinetic energy. This means that the particles move around faster, which leads to more frequent collisions, thus increasing the rate of reaction. Also, as the particles have more energy due to the higher temperature, more energy will be transferred during a collision between the particles. This greater energy transferred between the particles during a collision is more likely to satisfy the activation energy, thus resulting in a reaction taking place. So, a greater temperature increases the rate of reaction
3) A greater concentration means that there are more particles in a given volume; the particles are closer together. This means that there will be more frequent collisions and therefore a greater rate of reaction
4) A greater surface area to volume ratio means that there is a greater surface area on the reactants for the particles to collide upon. This will result in more frequent collisions and therefore a greater rate of reaction
5) Activation energy is the minimum amount of energy that is required to start a reaction
Questions
1)
a) According to collision theory, what are the 3 different factors that affect the rate of reaction?
b) The effect that these 3 factors have on the rate of reaction can be split into two different categories; what are these two categories? You do not need to explain the different categories.
2) Does a greater temperature lead to a greater or lower rate of reaction? Explain your answer in terms of collision theory.
3) Does a greater concentration lead to a greater or lower rate of reaction? Explain your answer in terms of collision theory.
4) Does a greater surface area to volume ratio lead to a greater or lower rate of reaction? Explain your answer in terms of collision theory.
5) Define activation energy.
1)
a) According to collision theory, what are the 3 different factors that affect the rate of reaction?
b) The effect that these 3 factors have on the rate of reaction can be split into two different categories; what are these two categories? You do not need to explain the different categories.
2) Does a greater temperature lead to a greater or lower rate of reaction? Explain your answer in terms of collision theory.
3) Does a greater concentration lead to a greater or lower rate of reaction? Explain your answer in terms of collision theory.
4) Does a greater surface area to volume ratio lead to a greater or lower rate of reaction? Explain your answer in terms of collision theory.
5) Define activation energy.