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Flashcards in Reactions, paper 2 Deck (10)
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1

Rate of reaction =

Amount of reactants used / time.

2

What factors effect the rate of reaction (5)

- temperature
- pressure
- concentration
- surface area.
- catalysts.

3

How does temperature effect the rate of reaction?

The higher the temperature, the quicker the rate of reaction. As the particles move quicker making more collisions per second.

4

How does pressure and concentration effect the rate of reaction?

More collisions as there are more particles in a smaller space making collisions more frequent.

5

How does surface area effect the rate of reaction?

As there is more area where one substance can meet another substance so more collisions can take place.

6

What is a catalyst?

- they speed up a chemical reaction.
- they don’t get used up durning the reaction.

7

What is the benefit of using a catalyst?

- quickens the reaction.
- lowers the activation energy needed to start a reaction.

8

Bendy Mexican

Break - endothermic.
Making - exothermic.

9

What is the energy movement like in a endothermic reaction?

Energy is moved from the surroundings into the products.
- surroundings get colder
- products have more energy after reaction than before it.

10

What is the energy movement like in a exothermic reaction?

The energy moves from the reaction to the surroundings.
- surroundings get warmer,
- products have less energy than what they had before the reaction.