Carbon cannot be used in the reduction of Al_ | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) The reduction of a metal oxide by carbon is thermodynamically feasible only if the Gibbs free energy change $(\Delta G)$ for the reaction is negat

Vedclass · Accepted Answer

the enthalpy of formation of $Al_2O_3$ is too high

Vedclass · Answer

(D) The reduction of a metal oxide by carbon is thermodynamically feasible only if the Gibbs free energy change $(\Delta G)$ for the reaction is negative.$Al_2O_3$ has a very high negative enthalpy of formation,meaning it is extremely stable.Carbon cannot reduce $Al_2O_3$ to $Al$ because the affinity of $Al$ for oxygen is much higher than that of $C$ for oxygen at moderate temperatures.Therefore,the enthalpy of formation of $Al_2O_3$ is too high for carbon to act as a reducing agent.

Carbon cannot be used in the reduction of $Al_2O_3$ because

Similar Questions

What is Thomas slag?

Heating a mixture of $Cu_2O$ and $Cu_2S$ gives:

Carbon cannot reduce $Fe_2O_3$ to $Fe$ at a temperature below $983 \ K$ because

In the equation,$4M + 8CN^{-} + 2H_2O + O_2 \to 4[M(CN)_2]^- + 4OH^{-}$,the metal $M$ is

Identify the reaction that does not take place during the smelting process of copper extraction.

Vedclass Test Series

Exam Paper Generator

Online Exam Module