Question

Using Ellingham diagram indicate the lowest temperature at which Zno
can be reduced to Zinc metal by carbon Write the overall reduction reaction at this
temperature​

Answer 1

Answer:

1) 1000K is the lowest temperature at which ZnO can be reduced to Zn.

2)

The overall reaction for the following process is

ZnO(s) + C(s) ----> Zn(s) + CO(g)

Explanation:

Ellingam diagram is used to find the equilibrium temperature of metal oxidw and it's reaction with other gases.

We can observe from the Ellingam diagram that the standard free energy change required for the production of Carbon monoxide CO is less than the energy change required for the production of ZnO.

Hence the lowest temperature is 1000K at which ZnO can be reduced to Zn.

Hence,

1) 1000K is the lowest temperature at which ZnO can be reduced to Zn.

2)

The overall reaction for the following process is ZnO(s) + C(s) ----> Zn(s) + CO(g).