Carbonyl fluoride, COF2, is an important intermediate used in the production of
ID: 837277 • Letter: C
Question
Carbonyl fluoride, COF2, is an important intermediate used in the production of fluorine-containing compounds. For instance, it is used to make the refrigerant carbon tetrafluoride, CF4 via the reaction 2COF2(g)<--- --->CO2(g)+CF4(g), Kc=5.30 If only COF2 is present initially at a concentration of 2.00 M, what concentration of COF2 remains at equilibrium? Express your answer with the appropriate units. question 2Consider the reaction
CO(g)+NH3(g)?HCONH2(g), Kc=0.880
If a reaction vessel initially contains only CO and NH3 at concentrations of 1.00 M and 2.00 M, respectively, what will the concentration of HCONH2 be at equilibrium?
Explanation / Answer
2COF2(g)<--- --->CO2(g)+CF4(g)
2 0 0
2-2x x x
Kc = x^2 / [2-2x]^2
= 5.3*[2-2x]^2 = x^2
=x= 0.82 and 1.277
the value of x = 1.277 is rejected
s o the final conc of COF2 = 2- 2* 0.82 =0.36 M
2]CO(g)+NH3(g)?HCONH2(g), Kc=0.880
1 2 0
1-x 2-x x
=0.880 = x /[1-x][2-x]
=x= 0.55
so the value HCONH2 be at equilibrium = x = 0.55 M