Question

A volume of 20 litres of hydrogen chloride was completely decomposed to its constituent element

(hydrogen and chloride). what are the volumes of this constituent elements

Answer 1

Reaction:

2HCl = H₂ + Cl₂

from the equation we can find out:

n(H₂) = n(Cl₂) = ${\frac {n(HCl)} {2}}$

In same conditions molar volumes of gases are same too, and if n*V_m = V then

${\frac {V(H_2)} {V_m}}= {\frac {V(Cl_2)} {V_m}}= {\frac {V(HCl)} {2V_m}}$

$V(H_2)=V(Cl_2)= {\frac {V(HCl)} {2}}={\frac {20} {2}}=10$ litres

V(H₂) = 10 litres

V(Cl₂) = 10 litres

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