Answer
Verified
39k+ views
Hint: The average kinetic energy of a molecule is given by, $K.E. = \dfrac{3}{2}kT$ where $k$ is the Boltzmann constant and $T $is the absolute temperature of the gas.
Complete step by step solution:
We already know that, in order to know the properties of gases and the gas laws theoretically, a theoretical model of gas was given which is known as the “Kinetic molecular theory of gases”.
There are several postulates of Kinetic Theory of Gases which are as follows:
1. All molecules of a particular gas are identical in mass and size and this differs from gas to gas.
2. The molecules of a gas are separated from each other by large distances so that the actual volume of the molecules is negligible compared to the total volume of gas.
3. It was assumed that the force of attraction between molecules is negligible.
4. The molecules were supposed to be moving in different directions with different velocities.
5. The pressure exerted on walls of containers is due to the bombardment of molecules on walls of containers.
6. The collision between molecules was assumed to be perfectly elastic so that no energy is wasted during collision.
7. Since molecules are moving with different velocities, this means that they possess different kinetic energies. However, the average kinetic energy of molecules of a gas is directly proportional to the absolute temperature of gas. This has emerged as a result of the fact that when the temperature of gas is raised, the molecules start moving faster. Thus, their individual kinetic energy increases and hence the average kinetic energy also increases.
Therefore, on looking at postulate 7 we can say that option C is the correct answer.
Note: It should be remembered that the average kinetic energy of a molecule of any particular gas only depends on the absolute temperature of the gas and doesn’t depend on the size of molecule of the given gas.
Complete step by step solution:
We already know that, in order to know the properties of gases and the gas laws theoretically, a theoretical model of gas was given which is known as the “Kinetic molecular theory of gases”.
There are several postulates of Kinetic Theory of Gases which are as follows:
1. All molecules of a particular gas are identical in mass and size and this differs from gas to gas.
2. The molecules of a gas are separated from each other by large distances so that the actual volume of the molecules is negligible compared to the total volume of gas.
3. It was assumed that the force of attraction between molecules is negligible.
4. The molecules were supposed to be moving in different directions with different velocities.
5. The pressure exerted on walls of containers is due to the bombardment of molecules on walls of containers.
6. The collision between molecules was assumed to be perfectly elastic so that no energy is wasted during collision.
7. Since molecules are moving with different velocities, this means that they possess different kinetic energies. However, the average kinetic energy of molecules of a gas is directly proportional to the absolute temperature of gas. This has emerged as a result of the fact that when the temperature of gas is raised, the molecules start moving faster. Thus, their individual kinetic energy increases and hence the average kinetic energy also increases.
Therefore, on looking at postulate 7 we can say that option C is the correct answer.
Note: It should be remembered that the average kinetic energy of a molecule of any particular gas only depends on the absolute temperature of the gas and doesn’t depend on the size of molecule of the given gas.
Recently Updated Pages
silver wire has diameter 04mm and resistivity 16 times class 12 physics JEE_Main
A parallel plate capacitor has a capacitance C When class 12 physics JEE_Main
A series combination of n1 capacitors each of value class 12 physics JEE_Main
When propyne is treated with aqueous H2SO4 in presence class 12 chemistry JEE_Main
Which of the following is not true in the case of motion class 12 physics JEE_Main
The length of a potentiometer wire is 10m The distance class 12 physics JEE_MAIN
Other Pages
When an electron and a proton are placed in an electric class 12 physics JEE_Main
A closed organ pipe and an open organ pipe are tuned class 11 physics JEE_Main
Differentiate between homogeneous and heterogeneous class 12 chemistry JEE_Main
The resultant of vec A and vec B is perpendicular to class 11 physics JEE_Main
Dissolving 120g of urea molwt60 in 1000g of water gave class 11 chemistry JEE_Main
If a wire of resistance R is stretched to double of class 12 physics JEE_Main