For a reaction involving only gases at 25?C the equilibrium constant can be expressed in terms of molarity Ke or partial pressure Kp. Which is true about the numerical value of Kp ?

• A. Kc is generally greaer than Kp
• B. Kc is generally less than Kp
• C. Kc is generally equal to Kp
• D. Kc is equal to Kp if the total moles of reactants and products are equal