Question

This system has an equilibrium constant of 50.5 at 448°C: H2(g) + I2(g) ↔ 2HI(g).

What is the reaction quotient, Q, for this system when [H2] = 0.200 M, [I2] = 0.100 M, and [HI] = 3.00 M?
HELPPP

Answer 1

Just finished it... The answer is 450... Hope this helped.

Answer 2

For a general reaction:

`aA+bB\rightarrow cC+dD`

Expression for reaction quotient is written as follows:

`Q=([C]^(c)[D]^(d))/([A]^(a)[B]^(b))`

Here, [A], [B], [C] and [D] is concentration of A, B, C and D respectively and a, b , c and d is their respective stoichiometry.

The given reaction is as follows:

`H_(2)(g)+I_(2)(g)\rightleftharpoons 2HI(g)`

Thus, expression for reaction quotient will be:

`Q=([HI]^(2))/([H_(2)][I_(2)])`

Putting the values,

`Q=((3.00 M)^(2))/((0.200 M)(0.100 M))=450`

Therefore, the value of reaction quotient is 450.