Answer : The amount of heat released is, -3609 KJ
Solution : Given,
Enthalpy of reaction, [tex]\Delta H_{rxn}[/tex] = -1230 KJ
Moles of [tex]O_2[/tex] = 3 moles
The given balanced reaction is,
[tex]Mg+O_2\rightarrow 2MgO[/tex]
From the balanced reaction we conclude that
1 mole of [tex]O_2[/tex] releases heat = -1230 KJ
3 moles of [tex]O_2[/tex] releases heat = [tex]\frac{3moles}{1mole}\times -1230KJ=-3609KJ[/tex]
Therefore, the amount of heat released is, -3609 KJ
