Which of the following sets comprises of kinetic molecular theory of matter? *
a) Inter- particle attraction between the particles in solid is maximum.
b) Inter- particle space between the particles in liquid is negligible.
c) Inter- particle space between the particles in gas is minimum.
d) Inter- particle attraction between the particles in gas is maximum.
Answers
Answer:
All particles have energy, and the energy varies depending on the temperature the sample of matter is in, which determines if the substance is a solid, liquid, or gas. Solid particles have the least amount of energy, and gas particles have the greatest amount of energy.
The temperature of a substance is a measure of the average kinetic energy of the particles. A change in phase may occur when the energy of the particles is changed.
There are spaces between particles of matter. The average amount of empty space between molecules gets progressively larger as a sample of matter moves from the solid to the liquid and gas phases.
Answer:
Allied solutions
Grade 8
Chemistry
Chapters in Simplified Middle School Chemistry - Class 8
Exercises in Matter
Question 11
Q11) With reference to inter-conversion of matter - on the basis of kinetic theory - explain in brief the conversion of :
A solid into a liquid
A liquid into a vapour
Vapour (or gas) into a liquid
A liquid into a solid
Solution:
A solid into a liquid The kinetic energy increases as the solid is heated to convert into liquid. The heat energy is absorbed by the molecules of solid and stored in the form of potential energy. The interparticle spaces between molecules increase. As the space between molecules increases, they move around more, increasing the collision. The inter-particle attraction decreases as the molecules move away from each other.
A liquid into a vapour The kinetic energy increases as the liquid is heated to convert into solid. The heat energy is absorbed by the molecules of liquid and stored as potential energy. The interparticle spaces between molecules of liquid increase. As the space between molecules increases, they move around more freely. This increases the collision between molecules, they push apart and escapes gas. The inter-particle attraction decreases as the molecules move away from each other.
Vapour [or gas] into a liquid The potential energy stored by vapour molecules is released in the form of heat energy. The interparticle spaces between molecules decrease and they become compact. As the space between molecules decreases, they cannot move around as freely as before. The inter-particle attraction increases as the molecules come closer to each other.
A liquid into a solid The potential energy stored by liquid molecules is released in the form of heat energy. The interparticle spaces between molecules decrease and they are now closely packed. As the space between molecules is negligible, they cannot move around at all. The inter-particle attraction increases rapidly as the molecules come closer to each other.
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