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Chemistry
Chemistry
Problem
Δ
H
f
∘
\Delta H_f^\circ
Δ
H
f
∘
of
Fe
2
O
3
\text{Fe}_2\text{O}_3
Fe
2
O
3
and
Al
2
O
3
\text{Al}_2\text{O}_3
Al
2
O
3
are
−
189
kJ mol
−
1
-189 \text{ kJ mol}^{-1}
−
189
kJ mol
−
1
and
−
405
kJ mol
−
1
-405 \text{ kJ mol}^{-1}
−
405
kJ mol
−
1
respectively. How much heat (in kJ) is given out during reaction of 1 g Al according to
2
Al
+
Fe
2
O
3
⟶
Al
2
O
3
+
2
Fe
2\text{Al} + \text{Fe}_2\text{O}_3 \longrightarrow \text{Al}_2\text{O}_3 + 2\text{Fe}
2
Al
+
Fe
2
O
3
⟶
Al
2
O
3
+
2
Fe
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