In: Chemistry
The reaction between sulfur gas (S2) and carbon (C) at high temperatures (900C) results in the formation of carbon disulfide (CS2). The reaction is: C(s) + S2(g) = CS2(g). What is the concentration (in moles in reaction chamber) of CS2(g) at equilibrium if 3.00 moles of S2(g) and excess carbon are initially added to the 1.00 L reaction chamber? The Keq for this reaction is 3.50.
Solution :-
C(s) + S2(g) = CS2(g)
Initial concentration of S2= 3.00 mol / 1.00 L = 3.00 M
Equilibrium concentration of the CS2 = ?
Keq = 3.50
Lets make the Ice table
C(s) + S2(g) ----- > CS2(g)
3.00 M 0
-x +x
3.00 –x x
Keq = [CS2]/[S2]
3.50 = [x] / [3.00-x]
X= 2.33
Therefore the equilibrium concentration of the CS2(g) = 2.33 M