Final answer:
Kp is the equilibrium constant expressed in terms of partial pressures, while Kc is the equilibrium constant expressed in terms of molar concentrations. For an equation where Kc equals Kp, it should involve only solutions, liquids, and solids and not involve a change in the number of moles of gas present.
Step-by-step explanation:
Kp is the equilibrium constant expressed in terms of partial pressures, while Kc is the equilibrium constant expressed in terms of molar concentrations. However, there is a relationship between Kp and Kc.
For reactions that involve only solutions, liquids, and solids, the relationship is Kp = K, where K is the equilibrium constant expressed in terms of molar concentrations. Thus, for the equation where Kc equals Kp, the equation should involve only solutions, liquids, and solids and not involve a change in the number of moles of gas present.