Advertisements
Advertisements
Question
Reduction of metal oxide to metal becomes easier if the metal obtained is in liquid state. Why?
Advertisements
Solution
Entropy of a metal in the liquid state is higher than that of the same metal in the solid state (Sliquid > Ssolid). So, when the metal formed is in the liquid state and the metal oxide being reduced is in the solid state, the value of entropy change (ΔS) for the reduction reaction is more on the positive side. When the value of TΔS increases and that of ΔH remains the same, the value of ΔGr° for the reduction reaction becomes negative and thus reduction becomes easier.
APPEARS IN
RELATED QUESTIONS
Define Hydrometallurgy?
What is the role of zinc metal in the extraction of silver ?
Name the processes from which chlorine is obtained as a by-product.
Which one of the following oxidation state of Manganese is unstable?
(a) + 2
(b) + 4
(c) + 5
(d) + 7
What happens when HCl is added to MnO2? Write the equations involved
What is the action of carbon on the following metal oxides :
ZnO in the vertical retort furnace
An element X (molar mass = 60 g mol−1) has a density of 6.23 g cm−3. Identify the type of cubic unit cell, if the edge length of the unit cell is 4 ✕ 10−8 cm.
Which metal is also found in sea beds?
Why are sulphide ores converted to oxide before reduction?
Which of the following reactions is an example of auto reduction?
