Home › Tamil Nadu SSLC (Class 10) › Physics › Thermal Physics › In the ideal gas equation $PV = RT$, what is the…
In the ideal gas equation $PV = RT$, what is the value of the universal gas constant $R$?
A$8.03\ \text{J mol}^{-1}\text{K}^{-1}$
B$8.31\ \text{J mol}^{-1}\text{K}^{-1}$
C$3.81\ \text{J mol}^{-1}\text{K}^{-1}$
D$1.38\ \text{J mol}^{-1}\text{K}^{-1}$
Answer & Solution
Correct answer: B. $8.31\ \text{J mol}^{-1}\text{K}^{-1}$
1. The ideal gas equation is the equation of state, $PV = RT$.
2. Here $R$ is the universal gas constant.
3. Its accepted value is $8.31\ \text{J mol}^{-1}\text{K}^{-1}$.
4. The value $1.38$ (in $\times 10^{-23}$) is the Boltzmann constant, not $R$, so it is a trap.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 3 Thermal Physics "Ideal Gas Equation", p.45_
Related questions
Temperature is best described as a measure of which property of the molecules of a substanUnder what condition does a real gas behave most nearly like an ideal gas?Avogadro's law states that, at constant pressure and temperature, the volume of a gas is dCharles's law states that, at constant pressure, the volume of a gas is related to its temAt constant temperature, a gas of volume 20 cc is compressed until its pressure becomes foAccording to Boyle's law, what remains constant when a fixed mass of gas is compressed at A liquid in a 70 ml container starts at level $L_1 = 50$ ml, falls to $L_2 = 48.5$ ml, theA liquid is heated in a container. The level first falls and then rises. Which statement a