what is a reversable reaction
a reacgtion that can occur both forwards and backwards
What is the rule with regard to the energy released during a rreversable reaction
the amount of energy released in one direction must be the same as the energy absorbed in the opposite direction
what is an exothermic reaction
a reaction that releases heat
what is an endothermic reaction
a reaction that absorbs / takes in heat
give an example of an endothermic reaction
(what is the colour change from white to blue a useful test for
this is a useful test for presance of water
the reaction is exothermic so energy is transfer to the surroundings
what can anhydrous coopper (II) sulfate be used to test for
presence of water
why does blue colbolt II chloride turn pink if left int he open air
as it absorbs water in the air (humidity) it turns pink.
The christaline structure shift to make room for the water molecules
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