For CS2(g) + 4H2(g) forming CH4(g) + 2H2S(g), Kc = 0.28 at 900 degrees Celsius. What is Kp?

1. Count gaseous moles: products give 1 + 2 = 3, reactants give 1 + 4 = 5. 2. So delta n = 3 minus 5 = minus 2. 3. Convert the temperature: 900 degrees Celsius is 1173 kelvin. 4. With R = 0.0821, the product RT = 0.0821 x 1173 = 96.3. 5. Square it: 96.3 x 96.3 = 9.27 x 10^3. 6. Apply the rule: Kp = 0.28 divided by 9.27 x 10^3 = 3.0 x 10^-5. 7. Multiplying instead of dividing would give the trap value near 2.6 x 10^3. 8. Kp equals Kc only when delta n is zero, which is not the case here. _Source: OpenStax Chemistry (CC BY 4.0), Ch 13 "Fundamental Equilibrium Concepts", section 13.2 Equilibrium Constants_