Question

43. Calculate the number of phases and
components in the following system-
Fe(s) + H2O(g) = FeO (s) + H2 (9)

*
3,2
3,3
3,1
2,3​

Answer 1

Answer:

phases are 3 , and components are also 3

Explanation:

phases are 3 bcz of 1.Fe ,2.FeO ,3. H2O and H2 both are at gracious form ...

For components we know the formula C=N-E

N- 4 and E -1 ... so C =3

Answer 2

Option (b) is the correct answer
Number of phases are is 3 , and components are also 3
Explanation for correct answer is
- There are two solid phases, Fe and FeO and one gaseous phase consisting of H2O(g) and H2(g).
- Thus, three phases exists in equilibrium

[tex]Fe(s) + H2O ----- FeO(s) + H2(g)[tex]
- Two solid phases of Fe and FeO and one gaseous phase consisting of H2O(g) and H2(g).The heterogonous system consists of 2 or more phases

PHASE RULE:
If the equilibrium between any number of phases is not influenced by
gravitational/electrical/magnetic forces but is influenced by pressure, temperature, and concentration, then the number of degrees of freedom (F) is related to the number of components (C) and the number of phases (P) as: F = C − P + 2
Explanation for incorrect answer is
(a) 3,2(c) 3,1 (d) 2,3 are the incorrect answer because for the given chemical reaction the phases and components are 3,3
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