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# q2p302key - CH 302 TA Practice Quiz 2-Answer Key 1...

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CH 302 TA Practice Quiz 2--Answer Key 1. Determine the correct equilibrium expression for the reaction of hydrogen gas with nitrogen gas to produce ammonia gas. (You will need to write the balanced reaction yourself) a. K p = {P N2 P H2 2 } / P NH3 3 b. K p = P NH3 3 / {P N2 P H2 2 } c. K c = [NH 3 ] 2 / {[N 2 ][H 2 ] 3 } d. K c = {[N 2 ][H 2 ] 2 } / [NH 3 ] 3 3H 2 (g) + N 2 (g) ° 2NH 3 (g) Products over reactants. Coefficients are exponents. 2. In the reaction below the partial pressures are P CO2 = 2 atm, P Cl2 = .20 atm, P CCl4 = 10 atm, P O2 = 0.5 atm. Determine the direction of the reaction and why. (K p = 6.4 x 10 -18 ) CO 2 (g) + 2 Cl 2 (g) ° CCl 4 (g) + O 2 (g) a. Shift right, Q<K b. Shift left, Q=K c. Shift left, Q<K d. Shift right, Q>K e. Shift left, Q>K f. No shift, K<Q When Q > K the reaction will shift in the reverse to decrease Q until it equals K. Q = ( P CCl4 x P O2 ) / ( P CO2 x P Cl2 2 ) = (10 x .5) / (2 x .20 2 ) = 62.5 62.5 > 6.4 x 10-18

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q2p302key - CH 302 TA Practice Quiz 2-Answer Key 1...

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