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True or False: The reaction 3H2(g) + N2(g) => 2NH3(g),?
Kc = 9.0 at 350°C proceeds from right to left when 1.0 mol NH3, 5.0 mol N2, and 5.0 mol H2 are mixed in a 2.5 L reactor.
why is it False when K>1 and dS is (-) spontaneous in reverse rxn?
2 Answers
- 2 years ago
"Because Q < Kc, the reaction will proceed from the right to the left" this part of your answer is wrong. everything else is correct. Q<K which makes the rxn proceed right, hence false is the answer.
- hcbiochemLv 72 years ago
When trying to answer this question, you calculate the reaction quotient, Q, and compare that to Kc.
Q = [NH3]^2 / [N2][H2]^3
[NH3] = 1.0 mol / 2.5 L = 0.4 M
[N2] = 5mol / 2.5 L = 0.5 M
[H2] = 5 mol / 2.5 L = 0.5 M
Q = (0.4)^2 / (0.5)(0.5)^3 = 2.56
Because Q < Kc, the reaction will proceed from the right to the left, forming more NH3 and consuming H2 and N2 until Q = Kc.
