Question

Part A Carbonyl fluoride, COF2, is an important intermediate used in the production of fluorine-containing compounds....

Part A

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 246 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.

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 2.40 bar and 1.60 bar, respectively, what will the partial pressure of HCONH2 be at equilibrium?

Homework Answers

Answer #1

A)

Initial Pressure of COF2 = 246 kPa

Reaction: 2COF2(g)⇌CO2(g)+CF4(g)

Initial: .......246 ..............0............0

Change: ..-2p .............+p..........+p

Final:.....246-2p..........p..............p

Kp = p * p / (246 - 2p)

=> 7.8 = p * p / (246 - 2p)

=> p = 36.7 kPa

Total Pressure at equilibrium = 246 - 2p + p + p = 246 kPa

Partial Pressure of COF2 = 246 - 2p = 172.6 kPa

B)

Reaction: CO(g)+NH3(g)⇌HCONH2(g)

Initial:.......2.4 .... 1.6 ..............0

Change: -p .......-p..................p

Final: ...2.4-p....1.6-p.............p

Kp = 2.7 = p / (2.4-p) * (1.6-p)

=> p = 1.218 kPa

Partial Pressure of HCON2 = p = 1.218 kPa

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