In a reversible chemical change, the reverse reaction is releasing heat energy in surrounding. The forward reaction must have been ______________

Exothermic

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Endothermic

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Fast chemical change

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Slow chemical change

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Solution

The correct option is B
Endothermic

Absorbing energy from the surrounding

Reversible reactions are where the products can react to remake the original reactants. If the forward reaction is exothermic, the reverse reaction is endothermic. Whether we look at exothermic or endothermic forms of chemical change, the heat is always exchanged with respect to the chemical system and it's immediate surrounding.

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Similar questions

A \to B i s E_{a}

A \to B

E_{a}

	Column I		Column II
a.	the amount of energy which must be invested in reaction to get it started	p.	chemical equilibrium
b.	a state in which the rate of forward reaction is exactly equal to the rate of the reverse reaction.	q.	activation energy
c.	a process or reaction which consumes heat	r.	endothermic
d.	a process or reaction that releases heat.	s.	exothermic
		t.	threshold energy

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