C2.4 Rates and Energy Flashcards Preview

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Flashcards in C2.4 Rates and Energy Deck (11):
1

What methods can be used to measure the rate of a reaction?

Measuring the decreasing mass, measuring the volume of gas given off, measuring the decreasing light passing through a solution

2

rate of reaction=

amount of reactant used or amount of product formed/time

3

What are the factors affecting the rate of a chemical reaction?

temperature, surface area, concentration/pressure and presence of a catalyst

4

what is the collision theory?

an explanation of chemical reactions in terms of reacting particles colliding with sufficient energy for a reaction to take place

5

What is the activation energy?

the smallest amount of energy that particles must have before they can react

6

What can you increase to increase the chance of particles reacting?

the chance of the reacting particles to collide, increase the energy that they have when they collide

7

Why does raising the temperature increase the rate of reaction?

particles collide more often and particles collide with more energy

8

Advantages to using catalysts

save the environment and money

9

Examples of endothermic reaction

thermal decomposition

10

Examples of exothermic reaction

neutralisation, respiration

11

If a reversible reaction is exothermic, does it move to A+B or C+D?

C+D