Question

one mole of N2 is mixed with 3 moles of H2 in litre container . if 50% of H2 is converted into ammonia by reaction N2+ 3H2 it gives 2NH3 then the total no. of moles of gas the equilibrium are

Answer 1

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Answer 2

Answer : The total number of moles of gas are, 3 moles

Explanation :

The balanced equilibrium reaction is,

                            $N_2(g)+3H_2(g)\rightleftharpoons 2NH_3(g)$

initially moles          1          3                  0

At eqm.                 (1 - x)     (3 - 3x)          2x

Total number of moles of gas = $(1-x)+(3-3x)+2x=4-2x$

As 50% of $H_2$ is converted into ammonia. So,

$3-3x=3\times \frac{50}{100}\\\\3-3x=1.5\\\\x=0.5$

Now we have to calculate the total number of moles of gas.

Total number of moles of gas = $4-2x=4-2(0.5)=3$

Therefore, the total number of moles of gas are, 3 moles