Worksheet 2 equilibrium expressions and calculations keq and q answers

Asked by admin @ 04/11/2021 in Chemistry viewed by 402 People

Lecture 19 Equilibrium II Worksheet 1)The equilibrium constant, K c , is 9.8 x 10 5 for H 2 (g) + S (s) H 2 S (g). a.Find the reaction quotient, Q c , if [H 2 ] = 0.762 M and [H 2 S] = 0.483 M . b.Has the process established equilibrium? If not, inwhich direction will it proceed? Justify your answer.

Answered by admin @ 04/11/2021

Answer:

a) Qc = 0.6338

b) Qc < Kc ⇒ the reaction proceeds to the right, towards the products.

Explanation:

H2(g) + S(s) ↔ H2S(g)

∴ Kc = 9.8 E5 = [H2S] / [H2]

a) reaction quotient, Q:

∴ Qc = [H2S] / [H2] = (0.483 M)/(0.762 M) = 0.6338

b) the process is not established equilibrium: Qc < Kc

⇒ The reaction evolves to the right, towards the products

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