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),    K=7.80 at 850 K

If only COF2 is present initially at a pressure of 252 kPa, what is the partial pressure of COF2 at equilibrium?

You can convert the units of pressure from kPa to bar, using the relation 1 kPa=0.01 bar.

Express your answer with the appropriate units.

PCOF2 =

0.383 bar

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Part B

Consider the reaction

CO(g)+NH3(g)⇌HCONH2(g),    K=2.70 at 550 K

If a reaction vessel initially contains only CO and NH3 at partial pressures of 2.00bar and 2.20 bar, respectively, what will the partial pressure of HCONH2 be at equilibrium?

Express your answer with the appropriate units.

PHCONH2 =

11.88bar

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Answer 1

CO(g)   +   NH3(g) <----------------->   HCONH2(g)

2.0 bar       2.2 bar                                     0

2 - x           2.2 - x                                        x

K = [HCONH2] / [CO][NH3]

2.70 = x / (2-x)(2.2 -x)

x = 1.378

P _HCONH2 = x = 1.378 bar