Energy changes and Reversible reactions

Question 1

Exothermic

Answer 1

A reaction that gives out heat

Question 2

Endothermic

Answer 2

A reaction that takes in heat

Question 3

Is breaking bonds exo/endothermic?

Answer 3

Endothermic

Question 4

Is making bonds exo/endothermic?

Answer 4

Exothermic

Question 5

Examples of exothermic

Answer 5

Burning
Neutralisation reactions
Acid + metal

Question 6

Exothermic change diagram

Answer 6

Reactants have more energy than products

Heat evolved is the difference between Reactant/product

Question 7

Exothermic deltaH

Answer 7

Negative number, losing heat

Question 8

What doe deltaH mean

Answer 8

Change in enthalpy

Question 9

Endothermic change diagram

Answer 9

Reactants lower than the products heat absorbed the difference

Question 10

Thermal decomposition

Answer 10

Endothermic

Question 11

La Chatelier’s Principle

Answer 11

If the dynamic equilibrium is disturbed by changing the conditions the reaction moves the counteract the change.

Question 12

Dynamic Equilibrium

Answer 12

Constant amounts of a continuing reaction

Question 13

Increasing the temperature

Answer 13

Favours Endothermic reaction

Question 14

Decreasing the temperature

Answer 14

Favours Exothermic reaction

Question 15

Rate of forward reaction is

Answer 15

equal to the backwards reaction

Question 16

Changes in pressure

Answer 16

Changes in pressure don’t affect the position of equilibrium, if the number of moles on both sides of the equation are equal

Question 17

Adding catalyst

Answer 17

Reduces the times taken, but does’t change the position of the equilibrium.