Give reason :
1) petroleum gas can be compressed.
2) The temperature of liquid remains constant at boiling point when changing in vapour
Give reason :
1) petroleum gas can be compressed.
2) The temperature of liquid remains constant at boiling point when changing in vapour
(1). Gases dont have specific volumes i.e. they are spread out, they're particles disperse and therefore occupy the volume of the container allocated to it and so added pressure can easily force these particles into a more compact volume. Solids and liquids have more compact particles and so they are given little room to move so they are not easily compressed, think of a sponge its particles anre spread out so u can compress it, but a rock has tightly packed particles and so they cannot be compressed easily.
in brief; the particles in gases are spread out more than those in a liquid or solid. Making them easier to compress. Liquids and solids are already more compact than a gas
(2). Water is made of molecules. Each of these molecules is moving at a certain speed; in aggregate the speed is called temperature, but each individual molecule is jiggling at a slightly different rate. When one of these molecules reaches just over 100 C, it is fast enough to break free of the mass of water and become steam. That means that any remaining molecules are just under 100 C. So the mass of water remains at around 100 C — any molecules that are warmer are no longer liquid, and since steam is lighter than water, they quickly leave the water.
Now it's obviously much more complicated than that — some molecules become hot enough to boil off but they are kept in by the pressure of their surrounding, slightly cooler neighbors; the boiling temp isn't precisely 100 C and varies with altitude and pressure; etc. — but that's the general idea.
in brief; the particles in gases are spread out more than those in a liquid or solid. Making them easier to compress. Liquids and solids are already more compact than a gas
(2).
Water is made of molecules. Each of these molecules is moving at a certain speed; in aggregate the speed is called temperature, but each individual molecule is jiggling at a slightly different rate. When one of these molecules reaches just over 100 C, it is fast enough to break free of the mass of water and become steam. That means that any remaining molecules are just under 100 C. So the mass of water remains at around 100 C — any molecules that are warmer are no longer liquid, and since steam is lighter than water, they quickly leave the water.
Now it's obviously much more complicated than that — some molecules become hot enough to boil off but they are kept in by the pressure of their surrounding, slightly cooler neighbors; the boiling temp isn't precisely 100 C and varies with altitude and pressure; etc. — but that's the general idea.
