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In reversible reactions, the reaction in one
direction will be exothermic and the
reaction in the other direction will be
endothermic.…read more

Slide 3

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The decomposition of ammonium
chloride is a reversible reaction:
ammonium chloride ammonia + hydrogen chloride
Ammonium chloride decomposes when it is heated, so the forward reaction is endothermic -
energy must be transferred from the surroundings for it to happen. The backward reaction is
exothermic - energy is transferred to the surroundings when it happens.…read more

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