1 4. A sample of ammonia gas was allowed to come to equilibrium at 400 K 2NH3(g)
ID: 1087555 • Letter: 1
Question
1 4. A sample of ammonia gas was allowed to come to equilibrium at 400 K 2NH3(g)N2(g) +3H2(g) At equilibrium, it was found that the concentration of H2 was 0.0591 M, the concentration of N2 was 00197 M, and the concentration of NHs was 0.441 M. What is Ke for this equilibrium? A) 3.97×10-3 B) 1.58×10-5 C) 2.10 × 10-5 D) 2.24 x 10 E) 2.65×10-3 5. A 15.00-L vessel at 700 K initially contains HI(g) at a pressure of 4.00 atm; at equilibrium, it is found that the partial pressure of Ha(g) is 0.387 atm. What is the partial pressure of HI(g) at equilibrium? 2HI(g) H2(g) +12(8) A) 4.00 atm B) 3.61 atm C 3.23 atm D) 4.39 atm E) 0.387 atmExplanation / Answer
4)
2NH3(g) <--------------> N2(g) + 3H2(g)
Kc = [H2]3[N2] / [NH3]2
Kc = [0.0591]3[0.0197] / [0.441]2
Kc = 4.07 x 10-6 / 0.1945
Kc = 2.10 x 10-5
answer = option C
5) 2HI(g) <--------------------> H2(g) + I2(g)
initially PHI = 4.00 atm
at equilibrium PH2 = 0.387 atm
PHI = 4.00 - (2 x 0.387) = 4.00 - 0.774
PHI = 3.23 atm
answer = option C
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