CHEMISTRY · Subjective · A Level · Chemistry · Chemical equilibria (Le Chatelier’s principle and Kc) · Chemical equilibria (Le Chatelier’s principle and Kc)
Problem
For the reaction H2(g)+I2(g)⇌2 HI(g), the equilibrium constant at 450∘C is Kc=64.
Particle counts were recorded at two times in the same 2.0L container:
• t1: 5 H2, 5 I2, 40 HI
• t2: 3 H2, 3 I2, 30 HI
At which time is the system at equilibrium? Justify your answer by comparing Qc to Kc for each time.