6.2.2 - Energy changes and reversible reactions

Question 1

True or false? If a reaction is endothermic in the forwards direction, it is also endothermic in the reverse direction.

Answer 1

False
If a reaction is endothermic in the forwards direction, it is exothermic in the reverse direction

Question 2

Is the same amount of energy transferred in both the forwards and backwards directions?

Answer 2

Yes

Question 3

Give an example of a reversible reaction and show which direction is endothermic and which is exothermic.

Answer 3

hydrated copper sulfate (blue) ⇌ anhydrous copper sulfate (white) + water

endothermic in the forwards direction, exothermic in the reverse direction.