The following reaction was performed in a sealed vessel at 780 ∘C
:

H2(g)+I2(g)⇌2HI(g)


Initially, only H2
and I2
were present at concentrations of [H2]=3.85M
and [I2]=2.00M
. The equilibrium concentration of I2
is 0.0600 M
. What is the equilibrium constant, Kc
, for the reaction at this temperature?