Aluminium can reduce chromic oxide, but not MgO. Why?
Share
Aluminium can reduce chromic oxide, but not MgO. Why?
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
HELLO FRIENDS
aluminium oxide is more stable than chromium oxide (at least at normal temperatures, and in fact all the way up to the decomposition temperatures of the oxides). Since the Gibbs free energy change is negative, aluminium can reduce chromium oxide
Alumino thermic process
Thermite reaction proceeding for a railway welding. Shortly after this, the liquid iron flows into the mould around the rail gap
The Ellingham curve for aluminium lies below the curves of most metals such as chromium, iron, etc. This fact indicates that aluminium can be used as the reducing agent for oxides of all these metals. This result is illustrated as follows:
The free energies of formation of chromium(III) oxide and aluminium oxide per mole of oxygen consumed are -541 kJ and -827 kJ respectively
Explanation:
Alumino thermic process
So aluminium oxide is more stable than chromium oxide (at least at normal temperatures, and in fact all the way up to the decomposition temperatures of the oxides). Since the Gibbs free energy change is negative, aluminium can reduce chromium oxide.
I hope that this will help you please mark this as brainliest don't forget to follow me and give me a heart ♥