Carbon cannot be used in reduction og Al2O3 because 1 It is expensive 2 The enthalpy of formation - Chemistry - General Principles and Processes of Isolation of Elements

Question

Carbon cannot be used in reduction og Al2O3 because 1 It is
expensive 2 The enthalpy of formation of CO2 is more than that of
Al2O3 3 pure carbon is not easily available 4 The enthalphy of
formation of Al2O3 Al2O3 is high Which is the correct option and
WHY?

Raveena Sharma · Accepted Answer

1 The enthalpy of formation of Al2O3 is very
high The correct option is (d)
2 This is because,Al is very high in reactivity as compared to C
and C is not able to reduce it The energy required is very high and
it cannot be compensated by reduction of C to CO2

Carbon cannot be used in reduction og Al2O3 because 1. It is expensive 2. The enthalpy of formation of CO2 is more than that of Al2O3 3 pure carbon is not easily available 4. The enthalphy of formation of Al2O3 Al2O3 is high. Which is the correct option and WHY?