How to Calculate the Number of Moles of One of the Components in a Mixture at Equilibrium – Part 1

Chemical equilibrium is the state in which both the reactants and products in a chemical reaction are present in concentrations that have no more propensity to change with time, s.t. there is no visible alteration in the system properties.


This state results when the forward reaction proceeds at the same rate as the reverse/backward reaction, and is known as dynamic equilibrium.

Vapor density is the density of a vapor in relation to that of hydrogen.

Mnemonic: ICE: Initial Change Equilibrium (concentration or partial pressure)

Question:

The vapor density of a mixture consisting of NO2 & N2O4 is 38.3 at 2.670C. Calculate the number of moles of NO2 in 100 g of the mixture.

Solution:



Click to enlarge the image

α = Degree of dissociation, M = Molar mass, D = Vapor density

Confused on vapor density vs. density❓ Let Chemaficionado know at mychemistryhomework@gmail.com❗

References:

(1)    Wikipedia Contributors. Chemical equilibrium. Wikipedia. https://en.wikipedia.org/wiki/Chemical_equilibrium.

‌(2)    Ncert. Chemistry : Textbook for Class XI - Part.I; National Council Of Educational Research And Training: New Delhi.

(3)    Wikipedia Contributors. Vapour density. Wikipedia. https://en.wikipedia.org/wiki/Vapour_density.
(4)    Wikipedia Contributors. Molar mass. Wikipedia. https://en.wikipedia.org/wiki/Molar_mass.

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