By using the ideal gas equation $PV = \mu RT$,write the value,unit,and dimension of $R$.

Vedclass pdf generator app on play store
Vedclass iOS app on app store
(N/A) The ideal gas equation is given by $PV = \mu RT$.
Rearranging for $R$,we get $R = \frac{PV}{\mu T}$.
At standard temperature and pressure $(STP)$,for $1 \text{ mole}$ of an ideal gas $(\mu = 1)$:
$P = 1.013 \times 10^{5} \text{ N/m}^2$
$V = 22.4 \times 10^{-3} \text{ m}^3$
$T = 273.15 \text{ K}$
Substituting these values:
$R = \frac{1.013 \times 10^{5} \times 22.4 \times 10^{-3}}{1 \times 273.15} \approx 8.314 \text{ J mol}^{-1} \text{ K}^{-1}$.
Unit of $R$: $\text{J mol}^{-1} \text{ K}^{-1}$ or $\text{N m mol}^{-1} \text{ K}^{-1}$.
Dimension of $R$:
Since $R = \frac{PV}{\mu T}$,the dimension is $\frac{[M^1 L^{-1} T^{-2}] [L^3]}{[mol] [K]} = [M^1 L^2 T^{-2} K^{-1} mol^{-1}]$.

Explore More

Similar Questions

The equation of state for $5 \, g$ of oxygen at a pressure $P$ and temperature $T$,when occupying a volume $V$,will be (where $R$ is the gas constant).

In the given pressure $(P)$ - absolute temperature $(T)$ graph of an ideal gas,the relation between volumes $V_1, V_2, V_3$ and $V_4$ is

At constant pressure,the ratio of the increase in volume of an ideal gas per degree rise in temperature to its original volume is ... (where $T$ is the absolute temperature of the gas).

$12\,g$ of gas occupies a volume of $4\times 10^{-3}\,m^3$ at a temperature of $7\,^oC$. After the gas is heated at constant pressure,its density becomes $6\times 10^{-4}\,g/cc$. Find the temperature $T$ (in $K$) to which the gas was heated.

Difficult
View Solution

The figure shows the isotherms of a fixed mass of an ideal gas at three temperatures $T_A, T_B$ and $T_C$. Then:

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial
For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free
For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo