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WorksheetsKinetis
Total questions: 26
Worksheet time: 18mins
A catalyst works by
changing the order of the reaction
increasing the temperature
lowering the activation energy
making the activated complex
Which of the following best describes why increasing temperature increase reaction rate?
Activation energy is reduced.
Collisions become more frequent.
Collisions become more energetic.
Collisions become more frequent and more energetic.
The ____________ states that atoms, ions, or molecules must collide in order to react.
transition state
activation energy
rate law
collision theory
An effective collision is defined as reactant particles having
Sufficient energy
proper orientation
sufficient energy and proper orientation
none of the above
The minimum amount of energy needed for colliding particles to react is called
Chemical Energy
Kinetic Energy
Activation Energy
Potential Energy
The rate of a chemical reaction is NOT affected by which of the following:
temperature
concentration
particle size (surface area)
All of these affect reaction rates
Which will increase the rate of a reaction?
Increasing the beaker volume
Lowering the temperature
using smaller pieces of solid
diltuing a solution
Increase in temperature of the reactants can do one of the following
Slow collision frequency
Allow less effective collision between the particles
Neutralise the reaction
increase collision between the particles thus increasing the rate.
If the temperature is reduced, a reaction rate will ______
increase
decrease
stay the same
If the concentration of a reactant is increased, the reaction rate will ___________.
increase
decrease
stay the same
The rate of reaction will increase if the number of __________ increases.
particles
collisions
both
If activation energy is low, it is _____________ for a reaction to start.
easy
difficult
neither
The main reason an increase in temperature results in an increase of the reaction rate is that
the potential energy of the particles increases
the duration of the collisions between particles increases
the force of attraction between particles increases
the number of particles with the required activation energy increases
What is the PE of the products?
100 kJ
175 kJ
50 kJ
75 kJ
What is the ΔH?
100 kJ
-50 kJ
50 kJ
75 kJ
What is the activation energy of this reaction?
100 kJ
175 kJ
50 kJ
75 kJ
On a maxwell-Boltzmann distribution curve, what would be a suitable x-axis label?
Potential Energy
Kinetic Energy
Activation Energy
Temperature
On a Maxwell-Boltzmann distribution curve, a suitable label for the y-axis is
Fraction of particles with Kinetic Energy (E)
Kinetic Energy (E)
Activation Energy (Ea)
Enthalpy
Which of the following are true when a catalyst is used in a chemical reaction?
- Enthalpy of reaction is lower.
- Activation energy for the reaction is lower.
- Enthalpy of reaction is same.
- Activation energy for the reaction is lower.
- Enthalpy of reaction is the lower.
- Activation energy for the reaction is same.
- Enthalpy of the reaction is same.
- Activation energy for the reaction is same.
