Ammonia has been studied as an alternative \"clean\" fuel for internal combustio

Question

Ammonia has been studied as an alternative "clean" fuel for internal combustion engines, since its reaction with oxygen produces only nitrogen and water vapor, and in the liquid form it is easily transported. An industrial chemist studying this reaction fills a 500 mL flask with 4.8 atm of ammonia gas and 1.9 atm of oxygen gas at 33 degress Celsius. He then raises the temperature, and when the mixture has come to equilibrium measures the partial pressure of nitrogen gas to be 0.63 atm. Calculate the pressure equilibrium constant for the combustion of ammonia at the final temperature of the mixture.

Explanation / Answer

                        4 NH3 (g) + 3 O2 (g) ------------> 2 N2 (g) + 6 H2O (g)

INITIAL :            4.8            1.9                              0.0               0.0 atm

From the balanced equation and from the given pressure of Nitrogen gas.

Equilibrium:      3.54 0.955                        0.63             1.89   atm

K = PN22 * PH2O6 / ( PNH34 * PO23)

K = (0.63)2*(1.89)6 / [ (3.54)4*(0.955)3]

K = 0.1323

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.