Question

Consider the elementary reactions and their rate constants.

A(g)+B(g)⟶C(g)+D(g) 𝑘𝑓=5.72×10−^2 s^−1
C(g)+D(g)⟶A(g)+B(g) 𝑘𝑟=2.60×10−^1 s^−1

What is the equilibrium constant ( 𝐾c ) of the following generic reaction?
A(g)+B(g)↽−−⇀C(g)+D(g)

I'm not really sure how to begin to solve this question?

Answer 1

Kc = kf/kr = ?
See this link
https://chem.libretexts.org/Bookshelves/General_Chemistry/Map%3A_A_Molecular_Approach_(Tro)/15%3A_Chemical_Equilibrium/15.02%3A_The_Equilibrium_Constant_(K)

Answer 2

This is actually really easy to solve and all you have to do is plug in the given equations into
Kc=kf/kr
Kc= (5.72*10^-2 s^-1)/ (2.60*10^-1 s^-1)