WorksheetsRates and Energy- end of quadmester test
Total questions: 20
Worksheet time: 10mins
What affect will increasing temperature have on rate of reaction
Increase
decrease
What is the theory that is used to explain rates of reaction
Activation theory
Collision theory
Active dynamic theory
If two particles collide a reaction will happens
True
Fasle
Activation energy is
The maximum amount of energy in a particle collisions
The energy needed to break make bonds
The minimum amount of energy of a collision needed to cause a chemical reaction
The energy that particles vibrate with
Which causes the faster rate of reaction
Large surface area
Small surface area
is a large Surface area associated with
Large chunks
Small chunks
studenst did carried out a reaction between hydrochloride acid and sodium thiosulphate- to limit spills they put the acid in a
Beaker
Test tube
Conical flask
studenst did carried out a reaction between hydrochloride acid and sodium thiosulphate- sulphur is made which makes the solution cloudy- to help measure this
place flask on a cross
place flask in a dark room
shine a lot of light onto the flask.
studenst did carried out a reaction between hydrochloride acid and sodium thiosulphate- they increased the concentration of acid, the effect of this was
the cross disappeared form view in a shorter time
the cross disappeared in a longer time
had no effect
Catalysts will…
Decrease activation energy and increase rate of reaction
Decrease activation energy and decrease rate of reaction
increase teh activation energy and increase the rate of reaction
Catalysts increase the rate of reaction by providing a different pathway for the reaction that has a higher activation energy.
True
Fasle
A + B react to make C. C thermally decomposed to make A + B. This is a an example of a
Catalyst is reaction
reversible reaction
Oxidation reaction
Neutralisation reaction
If a reversible reaction is exothermic in one direction, what will it be in the other direction
Exothermic
Endothermic
happen at a faster rate
Happen at a slower rate
Which type of cells operate with reversible reactions
Alkaline cells
Rechargeable cells
Release energy to the surroundings
Endothermic
Exothermic
Have to remove energy from the surroundings to achieve a reaction
Endothermic
Exothermic
Fuel cells work by being supplies with
Hydrogen
Oxygen
Hydrogen and oxygen
Oxygen and water
In fuel cells the hydrogen is burnt in a combustion reaction
True
False
In fuels cells the hydrogen in oxidised
Electrochemically
electrostatically
By combustion
By osmosis
The outputs from a electrochemical fuel cell are
Carbon dioxide
Sulphur dioxide
Water
Oxygen
