The equations for two reactions are shown.
1 $C{H_4} + 2{O_2} \to C{O_2} + 2{H_2}O$
2 $2{H_2} + {O_2} \to 2{H_2}O$
Which statement about the reactions is correct?
Heat energy is released during both these reactions.
2 )
Heat energy is absorbed during both these reactions.
3 )
Heat energy is released during reaction 1 but absorbed during reaction 2.
4 )
Heat energy is released during reaction 2 but absorbed during reaction 1.
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