Write the expression for Kc and Kp for the reaction
PH3BCl3(s) <==> PH3(g) + BCl3(g)
Kc = cocns products/concns reactants
Raise each to power of the coefficients. Kp is same except partial pressure instead of concn.
Solids are not included in either Kc or Kp.
The expression for the equilibrium constant, Kc, can be written as:
Kc = [PH3(g)] * [BCl3(g)] / [PH3BCl3(s)]
where [PH3(g)], [BCl3(g)], and [PH3BCl3(s)] represent the concentrations of PH3 gas, BCl3 gas, and PH3BCl3 solid, respectively.
The expression for the equilibrium constant, Kp, can be written as:
Kp = (pPH3 * pBCl3) / pPH3BCl3
where pPH3, pBCl3, and pPH3BCl3 represent the partial pressures of PH3 gas, BCl3 gas, and PH3BCl3 solid, respectively.
To write the expression for Kc and Kp for the given reaction, we need to understand the meaning of Kc and Kp.
Kc is the equilibrium constant expressed in terms of the concentrations of the reactants and products in the reaction mixture. It is calculated using the molar concentrations of the species involved.
Kp, on the other hand, is the equilibrium constant expressed in terms of the partial pressures of the reactants and products in the reaction mixture. It is calculated using the partial pressures of the species involved.
Now, let's proceed to write the expressions for Kc and Kp for the given reaction:
For Kc:
The general expression for Kc is given by:
Kc = ([C]^c * [D]^d) / ([A]^a * [B]^b)
For the given reaction, we have:
PH3BCl3(s) <==> PH3(g) + BCl3(g)
The stoichiometric coefficients of the reaction are:
a = 1 (for PH3BCl3)
b = 1 (for PH3)
c = 1 (for BCl3)
Therefore, the expression for Kc is:
Kc = ([PH3] * [BCl3]) / [PH3BCl3]
Here, [PH3], [BCl3], and [PH3BCl3] represent the molar concentrations of PH3, BCl3, and PH3BCl3, respectively.
For Kp:
The general expression for Kp is given by:
Kp = (Pc^c * Pd^d) / (Pa^a * Pb^b)
For the given reaction, the stoichiometric coefficients remain the same. Therefore, the expression for Kp is the same as the expression for Kc:
Kp = (PCl3 * PH3) / PH3BCl3
Here, PCl3, PH3, and PH3BCl3 represent the partial pressures of BCl3, PH3, and PH3BCl3, respectively.
Please note that the concentrations or partial pressures should be in equilibrium conditions to obtain accurate values for Kc and Kp. Also, the equilibrium concentrations/pressures should be properly defined based on the reaction conditions.