class 10 physics behaviour of gasses
Answers
Explanation:
- gass have weak intermolecular bond.
- it has high kinetic energy than liquid and solid.
- it's volume and shape is not fixed.
hope it helps........
The behaviour of gas molecules is explained with the help of the kinetic theory of gases. It is the study of gas molecules at the macroscopic level. Following are the five postulated of the kinetic theory of gases:
Gas is a composition of a large number of molecules that are constantly in a random movement.
The volume of the molecules is negligible as the distance between the gas molecules is greater than the size of the molecules.
The intermolecular interactions are also negligible.
The collision of molecules with each other and with the walls of the container is always elastic.
The average kinetic energy of all the molecules is dependent on the temperature.
Related articles:
Properties of gas
Derivation of kinetic theory of gases
What are the Factors that Affect the Behavior of Gases?
Following are the factors that affect the behaviour of gases:
Temperature (T)
Volume (V)
Pressure (P)
Quantity (n)
The above-mentioned factors are inter-related and they are given as follows:
As the temperature increases, the volume of the gas also increases due to an expansion of gas molecules.
As the temperature decreases, the volume of the gas also decreases due to the contraction of gas molecules.
As the temperature increases, the pressure of the gas also increases due to an expansion of gas molecules.
As the temperature decreases, the pressure of the gas also decreases due to the contraction of gas molecules.
For converting gas either into solid or liquid, the temperature of the gas must be very low or the pressure of the gas must be very high.
As the quantity decreases, the pressure will also decrease and with an increase in the quantity, the pressure also increases.
For pressure to decrease, the volume and quantity of the gas should be less.
For pressure to increase, the volume and quantity of the gas should be more.
What are Gas Laws?
There are five gas laws that affect the behaviour of gas molecules and they are as follows:
Boyle’s law
Charles’s law
Gay-Lussac’s law
Avogadro’s law
Ideal gas law
Boyle’s Law
According to Boyle’s law, the volume of the gas is inversely related to pressure when the amount of gas is fixed at a constant temperature. Mathematical representation of the law is given in the table:
P∝1V
PV = constant
P1V1 = P2V2 = P3V3 = constant
Where,
P is the pressure of a gas
V is the volume of gas
Boyle's Law
Charles’s Law
According to Charles’s law, the volume of the gas with a fixed mass is directly proportional to the temperature. Mathematical representation of the law is given in the table:
V ∝ T
Where,
T is the temperature of a gas
V is the volume of gas
Charles's Law
Gay-Lussac’s Law
According to Gay-Lussac’s law, when the volume of the gas is constant, the pressure of a given mass of gas varies directly with the absolute temperature of the gas. Mathematical representation of the law is given in the table:
P1T1=P2T2
Where,
T1 is the initial temperature
P1 is the initial pressure
T2 is the final temperature
P2 is the final pressure
Gay-Lussacs Law
Avogadro’s Law
According to Avogadro’s law, when the pressure and temperature of the given gas are constant, then the number of moles and the volume of the gas are in a direct relationship. Mathematical representation of the law is given in the table:
V ∝ n or Vn=k
Where,
V is the volume of the gas
n is the number of moles
k is the proportionality constant
Avogadro's Law
Ideal Gas Law
According to ideal gas law, the product of pressure and volume of one gram molecule of an ideal gas is equal to the product of a number of moles of the gas, universal gas constant and the absolute temperature. Mathematical representation of the law is given in the table:
PV = nRT = NkT
Where,
P is the pressure of the gas
V is the volume of the gas
n is the number of moles
R is the universal gas constant = 8.3145 J.mol-1.K-1
T is the temperature of the gas
N is Avogadro’s number, NA = 6.0221×1023
-----------------------------------------
follow..me....
mark..me..brainliest..