Question

when a change occur
1. energy change do not occur
2. energy is always given out
3.energy is always absorbed or released
4. energy is either absorbed or given out
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Answer 1

Answer:

4. Energy is either absorbed or given out

Explanation:

here rxn is either exothermic or endothermic

Answer 2

Answer:

$answer$

$4. \: energy \: is \: either \: absorbed \: or \: given \: out$