Consider the following equilibrium:

4fe(s) + 3 o2(g) < -- --> 2fe2o3(s);

which of the following equations is wrong?
kp=kc(rt)-5
kc=[o2]-3
kp= kc(rt)-3
kp = po2-3

The equation which is wrong is

Explanation:

For the given reaction:

The expression for is given by:

The concentration of solids are taken to be 1, only concentration of gases and liquid states are taken. The pressure of only gases are taken.

Relationship between is given by the expression:

where,

= number of moles of gaseous products - number of moles of gaseous reactants

R = gas constant

T= temperature

For the above reaction,

= number of moles of gaseous products - number of moles of gaseous reactants = 0 - 3 = -3

Hence, the expression for is:

Therefore, the equation which is wrong is