CO2 + 3H2 equilibrium CH4 + H2O
what is the forward and reverse reaction for it?
what are the units of Kc for this reaction?
Kc has no units in the SI system. If someone is teaching you otherwise, they are wrong.
forward and reverse depends on how you write it. In the above, forward is from the left to the right.
The forward reaction for the given equation is the conversion of CO2 and H2 into CH4 and H2O. On the other hand, the reverse reaction is the conversion of CH4 and H2O back into CO2 and H2.
The balanced chemical equation is:
CO2 + 3H2 ⇌ CH4 + H2O
To determine the units of Kc for this reaction, we first need to understand what Kc represents. Kc is the equilibrium constant for a chemical reaction and it relates the concentrations of the reactants and products at equilibrium. The equation for Kc is:
Kc = [C]^c [D]^d / [A]^a [B]^b
In this equation, [A], [B], [C], and [D] represent the molar concentrations of the reactants and products, and a, b, c, and d represent the stoichiometric coefficients in the balanced equation.
In the given reaction, the stoichiometric coefficients are all 1. Therefore, the units of Kc are determined by the units of concentration. Most commonly, the units for Kc are expressed in terms of molarity (mol/L) or concentration (e.g., moles per cubic meter, moles per liter, etc.) depending on the units used for the concentrations of the reactants and products.
So, the units of Kc for this reaction will depend on the units used to express the concentrations of CO2, H2, CH4, and H2O.