The Ideal Gas Law: Density Video Lessons

Concept:

Problem: Calculate the density of N2 at STP, (a) using the ideal-gas law and (b) using the molar volume and molar mass of N2. How do the densities compare?

FREE Expert Solution

We will use the ideal gas equation to find the density of the N2 gas at STP.

$\overline{){\mathbf{P}}{\mathbf{V}}{\mathbf{=}}{\mathbf{n}}{\mathbf{R}}{\mathbf{T}}}$

$\frac{\mathbf{P}\overline{)\mathbf{V}}}{\overline{)\mathbf{V}}}\mathbf{=}\frac{\mathbf{n}\mathbf{R}\mathbf{T}}{\mathbf{V}}\phantom{\rule{0ex}{0ex}}\mathbit{P}\mathbf{=}\frac{{\mathbf{n}}\mathbf{R}\mathbf{T}}{\mathbf{V}}$

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Problem Details

Calculate the density of N2 at STP, (a) using the ideal-gas law and (b) using the molar volume and molar mass of N2. How do the densities compare?