Answer:
The answer is B) 6.27 x 10⁻⁵
Explanation:
The relation between Kp and Kc is given by the following equation:
Kp= Kc (RT)ⁿ
We have:
Kc= 0.40
T= 700ºC= 973K
R=0,082 L.atm/K.mol
To obtain n (or usually called Δn which is the change in mol), we have to look at the number of mol of products (CH₃OH) and reactants (CO and H₂) in gaseous phase.
n= Δn= (total number of mol of products) - (total number of mol of reactants)
n=Δn= (mol CH₃OH) - (mol CO + mol H₂)= 1 - (1+2)= 1-3= -2
So, we introduce the values in the equation to obtain Kp:
Kp= Kc (RT)ⁿ
Kp= 0.40 (0.082 x 973)⁻²
Kp= 6.27 x 10⁻⁵
