Exo and Endo reactions

Question 1

Define exothermic reactions.

Answer 1

transfers energy to surroundings, so temp rises

Question 2

Define endothermic reactions.

Answer 2

Takes in energy from surroundings, so temp falls.

Question 3

What is the activation energy?

Answer 3

The minimum amount of energy needed required for particles to collide and react.

Question 4

Where is activation energy found on exo/endo graphs?

Answer 4

Line from curve to reactants.

Question 5

In exo graphs, are reactants higher or lower energy than products?

Answer 5

Higher

Question 6

In endo graphs, are reactants higher or lower energy than products?

Answer 6

Lower

Question 7

Explain the differences between endo and exo graphs.

Answer 7

Reactants>products, exo
Product>reactants, endo
In exo, energy is released rather than absorbed (reactants to products)

Question 8

RQ4: Give the method of finding temperature changes.

Answer 8

-measure 30cm3 of HCl acid into polystyrene cup and measure temp.
-measure 5cm3 of NaOH into polystyrene cup.
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