 channel for physics please subscribe my channel when we heard the word solid two words come in the mind liquid and gas yes the states of matter solid liquid gas let's talk about the molecule of solid liquid gas if we start the raising temperature of a solid the intermolecular distance of solid is going to be increased resulting the molecule is start away from each other and it turns to a liquid if we increase the temperature more they turns into a gas in other hand if we start decreasing the temperature what will happen the molecule is start returning to itself and they turns into liquid and finally if we still decrease the temperature what will happen they will turn into a solid the intermolecular distance is now going to be decrease decreased and they come in a proper shape let's talk about the liquid in liquid molecules are slightly far away from each other if we increase temperature that they got high kinetic energy they start leaving surface and turns into gas in other hand if we start decreasing temperature what will happen the molecules start coming closer closer the turns into a liquid and finally the intermolecular distance is going to be more decreased and the turns into a solid gas molecules they are a free moving each other if we increase temperature the pressure on the wall is going to be increased in other hand if we start decreasing temperature let's say start decreasing temperature what will happen the pressure of inside is become less the molecules are not describing much on the wall of the container let's discuss the change in its state let's talk about melting you can see in this picture that we have a solid here and you can see the graph during the melting process you can observe the temperature is remain constant it is at 0 degree Celsius until the whole solid is converted into liquid even the temperature will remain same but after conversion it started gaining kinetic energy and the temperature is going to be increased look at the graph look at the vibration of the particles how they are moving and colliding each other if in case if we convert liquid into gas or we'll try something else instead of melting we will try a boiling or evaporation let's take a liquid and you know the solid we have finished let's talk about gas let's say liquid liquid less better liquid to gas what will happen in case of liquid to gas you can observe in case of liquid to gas what will happen this the liquid is here the particles are gaining kinetic energy and we are providing them temperature what happened during this process and during the process it's called vaporization the all liquid particles are converted into gas particles and they are leaving the surface very quickly this is because we provided extra temperature but still you can see the total temperature of the boiling point which remain constant during the whole process of conversion from liquid to gas the remit temperature is remain 100 degree Celsius let's talk about gas gas to solid what will happen gas particles are we have put a place one lid on that so gas particles cannot leave them quickly and this is now condensing in the condensing is a reverse process in which gas poly molecules are going to be converted coming near to each other the intermolecular distance are less and they become liquid this is you can see in the graph the graph is now coming to decline it's coming back to be zero degree Celsius same as like but it was increasing before now it's decreasing and become a constant at zero point now it's start freezing during freezing also the temperature will remain constant let's summarize the properties of solid liquid and gas solid as a particular shape particular volume the molecules are tightly packed together they have a less intermolecular distance between them in liquids the molecules are slight apart from each other they can flow and overlap on each other they are not vibrating in a fixed position whereas if we talk about the gas particles they are freely move particles they are moving apart from each other they are moving randomly on any direction they diffuse easily from one place to another place you cannot hold it without a proper lid