In a closed flask, of gas and of gas are mixed for . At equilibrium, of have been formed. What is th — Chemical Equilibrium Chemistry Question
Question
In a $1\text{ L}$ closed flask, $3.0\text{ moles}$ of gas $A$ and $3.0\text{ moles}$ of gas $B$ are mixed for $A(g) + B(g) \rightleftharpoons C(g) + D(g)$. At equilibrium, $2.0\text{ moles}$ of $C$ have been formed. What is the value of the equilibrium constant $K_c$?
Answer: C
💡 Solution & Explanation
Initial: $A=3$, $B=3$. Let $x$ moles react. Eq: $A=3-x$, $B=3-x$, $C=x$, $D=x$. Given equilibrium $C = 2.0$, so $x=2.0$. Eq moles: $A=1$, $B=1$, $C=2$, $D=2$. $K_c = ([C][D]) / ([A][B]) = (2 \times 2) / (1 \times 1) = 4$.
💬Ask on WhatsApp →
Still have doubts about this question?
Send it to our AI chemistry tutor on WhatsApp — gets answered in minutes