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An intimate mixture of and Al is used in solid fuel rocket
CHEMISTRY · Subjective · A Level · Chemistry · Energetics · Energetics
Problem
An intimate mixture of
Fe
2
O
3
\text{Fe}_2\text{O}_3
Fe
2
O
3
and Al is used in solid fuel rocket. Calculate the fuel value per g and per mL of mixture.
Δ
H
Al
2
O
3
=
399.0
kcal
,
Δ
H
Fe
2
O
3
=
199.0
kcal
\Delta H_{\text{Al}_2\text{O}_3} = 399.0 \text{ kcal}, \Delta H_{\text{Fe}_2\text{O}_3} = 199.0 \text{ kcal}
Δ
H
Al
2
O
3
=
399.0
kcal
,
Δ
H
Fe
2
O
3
=
199.0
kcal
density of
Fe
2
O
3
\text{Fe}_2\text{O}_3
Fe
2
O
3
and Al are
5.2
g/mL
5.2 \text{ g/mL}
5.2
g/mL
and
2.7
g/mL
2.7 \text{ g/mL}
2.7
g/mL
respectively.
Related theory
Thermodynamics
Types of enthalpy
Enthalpy Changes of Reactions
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