Obtain coefficient of volume expansion from ideal gas equation.

Vedclass pdf generator app on play store
Vedclass iOS app on app store

Ideal gas equation,

$\mathrm{PV}=\mu \mathrm{RT}$

Where $\mathrm{P}=$ pressure, $\mathrm{V}=$ volume

$\mu=\text { no. of moles of gases }$

$\mathrm{R}=\text { gas constant }$

$\mathrm{T}=\text { absolute temperature }$

At constant pressure,

$\mathrm{P} \Delta \mathrm{V}=\mu \mathrm{R} \Delta \mathrm{T}$

By taking ratio of equation $(2)$ and $(1)$,

$\frac{\Delta \mathrm{V}}{\mathrm{V}}=\frac{\Delta \mathrm{T}}{\mathrm{T}}$ $\therefore\frac{\Delta \mathrm{V}}{\mathrm{V} \Delta \mathrm{T}}=\frac{1}{\mathrm{~T}}$ $\text { But } \frac{\Delta \mathrm{V}}{\mathrm{V} \Delta \mathrm{T}}=\alpha_{\mathrm{V}} \text { (coefficient of volume expansion) }$ $\therefore \alpha_{\mathrm{V}}=\frac{1}{\mathrm{~T}}$

For ideal gas, $\alpha_{V}=3.7 \times 10^{-3} \mathrm{~K}^{-1}$ at $0^{\circ} \mathrm{C}$ which is greater than solid and liquid.

For ideal gas $\alpha_{V}$ depend on temperature. It is inversely proportion to temperature. Hence it decrease with increase in temperature.

For ideal gas, $\alpha_{V}=3300 \times 10^{-6} \mathrm{~K}^{-1}$ at room temperature which is much more greater than liquids.

Similar Questions

''Anomalous expansion of water is blessing for living organisms in water''. Explain this statement. Explain Anomalous expansion of water.

A large steel wheel is to be fitted on to a shaft of the same material. At $27\,^{\circ} C ,$ the outer diameter of the shaft is $8.70\; cm$ and the diameter of the centrall hole in the wheel is $8.69 \;cm$. The shaft is cooled using 'dry ice'. At what temperature (in $^oC$) of the shaft does the wheel slip on the shaft? Assume coefficient of linear expansion of the steel to be constant over the required temperature range: $\alpha_{steel} =1.20 \times 10^{-3} \;K ^{-1}$

A steel rail of length $5\,m$ and area of cross-section $40\,cm^2$ is prevented from expanding along its length while the temperature rises by $10\,^oC$. If coefficient of linear expansion and Young's modulus of steel are $1.2\times10^{-5}\, K^{-1}$ and $2\times10^{11}\, Nm^{-2}$ respectively, the force developed in the rail is approximately

  • [JEE MAIN 2017]

A blacksmith fixes iron ring on the rim of the wooden wheel of a horse cart. The diameter of the rim and the iron ring are $5.243\; m$ and $5.231\; m$, respectively at $27^oC$. To what temperature (in $^oC$) should the ring be heated so as to fit the rim of the wheel?

If a bimetallic strip is heated, it will