The rate and extent of chemical change

What is defined as ‘how quickly a reactant is used up or a product is formed’?

Rate of reaction

Which theory states that for a chemical reaction to happen, reactant particles must collide and have enough energy to react?

Collision theory

What do a the name given to a collision that produces a reaction?

A successful collision

What is defined as ‘the maximum amount of energy needed for a successful collision’?

Activation energy

If the concentration or pressure of a reacting solution is increased, the number of ___ ___ will increase and therefore the ___ ___ ___ will increase

Successful collision, rate of reaction

Large lumps have a (larger/smaller) surface area to volume ratio than smaller lumps or powders

Smaller

If the surface area to volume ratio of a reacting solid is increased, the number of ___ ___ will increase because more reactant particles are ___ at the surface

Successful collisions, exposed

If the temperature of a reaction mixture is increased, the ___ of the particles increases so they move quicker and react with more ___

Energy, force

Does a catalyst alter the products of a reaction?

No

Is a catalyst chemically changed or used up at the end of a reaction?

No

What is the name for catalysts in biological reaction?

Enzymes

Catalysts provide an alternative activation pathway that has a ___ activation energy than the uncatalysed reaction

Lower

Catalysts (do/don’t) change the frequency of collisions but they (do/don’t) increase the frequency of successful collisions

Don’t, do

When a catalyst is used in a reaction, more particles have energy ___ than the activation energy

Greater

What type of reaction does the image show?

A reversible reaction

In a dynamic equilibrium, the forward and backward reactions have the ___ rate of reaction

Same

The ___ ___ of a reversible reaction is a measure of the concentrations of the reacting substances at equilibrium

Equilibrium position

When a change is made to a system at equilibrium, the position of equilibrium moves to ___ that change

Counteract

If the temperature is increased in reversible reaction, the position of equilibrium moves in the ___ direction to reduce the temperature

Endothermic

If the pressure is increased in a reaction involving gases, the equilibrium position moves in the direction of the ___ moles of gas

Fewest

If the concentration of a reactant is increased, the equilibrium position moves in the direction ___ from this reactant so ___ products are made

Away, more

If a product is removed from a reaction, the position of equilibrium moves to make ___ of that product

More