Question

The value of Δ_rG° for formation of Cr₂O₃ is – 540 kJmol^–1 and that of Al₂O₃ is – 827 kJ mol^-1. Is the reduction of Cr₂O₃ possible with Al?

Solution

The value of Δ_rG° for formation of Cr₂O₃ is – 540 kJmol^–1 is higher than Al₂O₃ is – 827 kJ mol^-1. Therefore the reduction of Cr₂O₃ with Al is possible.

{Cr}_{2} O_{3} (s) + 2 Al (s) \overset{∆}{\to} 2 Cr (l) + {Al}_{2} O_{3}

Some More Questions From General Principles And Processes of Isolation Of Elements Chapter

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General Principles And Processes Of Isolation Of Elements

The value of Δ_rG° for formation of Cr₂O₃ is – 540 kJmol^–1 and that of Al₂O₃ is – 827 kJ mol^-1. Is the reduction of Cr₂O₃ possible with Al?

Some More Questions From General Principles And Processes of Isolation Of Elements Chapter

What criterion is followed for the selection of the stationary phase in chromatography?

What is the role of cryolite in the metallurgy of aluminium?

Why is zinc not extracted from zinc oxide through reduction using CO?

What is the role of graphite rod in the electrometallurgy of aluminium?

Predict conditions under which Al might be expected to reduce MgO.

Define the term gangue or matrix.

Define the term flux.

Deine the term slag.

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General Principles And Processes Of Isolation Of Elements

The value of ΔrG° for formation of Cr2O3 is – 540 kJmol–1 and that of Al2O3 is – 827 kJ mol-1. Is the reduction of Cr2O3 possible with Al?

Some More Questions From General Principles And Processes of Isolation Of Elements Chapter

What criterion is followed for the selection of the stationary phase in chromatography?

What is the role of cryolite in the metallurgy of aluminium?

Why is zinc not extracted from zinc oxide through reduction using CO?

What is the role of graphite rod in the electrometallurgy of aluminium?

Predict conditions under which Al might be expected to reduce MgO.

Define the term gangue or matrix.

Define the term flux.

Deine the term slag.

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

The value of Δ_rG° for formation of Cr₂O₃ is – 540 kJmol^–1 and that of Al₂O₃ is – 827 kJ mol^-1. Is the reduction of Cr₂O₃ possible with Al?