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WorksheetsRate of Reactions
Total questions: 23
Worksheet time: 16mins
Is the study of the speed with which a chemical reaction occurs and the factors that affect this speed.
(a)
The relative speed of progress or change.
(a)
When we speak of the rate of a chemical reaction, we mean how fast/slow a given reaction occurs.
True
False
The speed of a reaction is called the (a) of the reaction.
Reactions take place when particles of reactants collide with a certain amount of energy.
(a)
Is the required energy to overcome for reactions to occur
(a)
Which statement is correct?
Higher activation energy = easier to happen
Higher activation energy = nothing happens
Higher activation energy = everything explodes
Higher activation energy = harder to happen
What does it mean when there's a lower activation energy?
it means things are harder to happen
it means things are easier to happen
it means the world will end
skibidi
The rate of a reaction depends on:
the frequency
the energy
the power
the temperature
Select the factors that speed up reactions
increased temperature
increased concentration
increased pressure
use of catalyst
The higher the temperature = particles have more energy. Meaning they move faster and are more likely to collide with other particles.
True
False
Particles collide with more energy.
More energy = increased number of collisions
True
False
The higher the concentration of a dissolved reactant, the faster the rate of reaction.
True
False
Higher concentration → less particles in the small amount of space → least likely to collide with other particles
True
False
Increased pressure → space where the gas particles are moving becomes smaller.
True
False
Increased pressure has the same number of particles but in a smaller space.
True
False
Particles become closer together, increasing the (a) , and so increasing the rate of reaction.
Any reaction involving a solid can only take place at the surface of the solid.
True
False
If the solid split into several pieces → surface area increases
*meaning there’s an increased area for the non-solid reactant particles to collide with.
True
False
The smaller the pieces → the larger the surface area
*meaning more collisions and a faster rate of reaction.
True
False
(a) are substances that change the rate of a reaction without being used up in the reaction.
(a) provide an alternative route with a lower activation energy.
Adding a pressure gives the reaction an alternative and easier way for it to happen – involving a lower activation energy.
True
False
