Advertisements
Advertisements
प्रश्न
List the factors affecting the mean free path.
उत्तर
- Mean free path increases with increasing temperature. As the temperature increases, the average speed of each molecule will increase.
- It is the reason why the smell of hot sizzling food reaches several metres away from the smell of cold food.
- The mean free path increases with decreasing pressure of the gas and the diameter of the gas molecules.
APPEARS IN
संबंधित प्रश्न
Choose the correct option.
The mean free path λ of molecules is given by where n is the number of molecules per unit volume and d is the diameter of the molecules.
If the temperature and pressure of a gas is doubled the mean free path of the gas molecules ____________.
Define mean free path and write down its expression.
What is the reason for the Brownian motion?
Derive the expression for the mean free path of the gas.
Calculate the mean free path of air molecules at STP. The diameter of N2 and O2 is about 3 × 10−10 m
Consider an ideal gas at pressure P, volume V and temperature T. The mean free path for molecules of the gas is L. If the radius of gas molecules, as well as pressure, volume and temperature of the gas are doubled, then the mean free path will be:
Mean free path of molecules of a gas is inversely proportional to ______.
Calculate the ratio of the mean free paths of the molecules of two gases having molecular diameters 1 A and 2 A. The gases may be considered under identical conditions of temperature, pressure and volume.
Ten small planes are flying at a speed of 150 km/h in total darkness in an air space that is 20 × 20 × 1.5 km3 in volume. You are in one of the planes, flying at random within this space with no way of knowing where the other planes are. On the average about how long a time will elapse between near collision with your plane. Assume for this rough computation that a saftey region around the plane can be approximated by a sphere of radius 10 m.
