Question

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characteristic of Chemical Reactions:
what is change in state ????

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Answer 1

All matter exists as solids, liquids, or gases. These are called the states of matter. Matter can change from one state to another if heated or cooled. If ice (a solid) is heated it changes to water (a liquid). This change is called MELTING. If water is heated, it changes to steam (a gas). This change is called BOILING. The particles of ice, water, and steam are identical, but arranged differently.


Some points to be remembered.....

SOLID PARTICLES

When solid, the particles of a substance are tightly packed together, making it rigid. A substance can change from a solid state to a liquid state, and from a liquid state to a solid state.




LIQUID PARTICLES

The particles in a liquid can move past one another. This allows liquids to flow. A substance in a liquid state can change to a solid state and also to a gas state



GAS PARTICLES

Particles in a gas are spread out and free to move around. This is why gases fill all the space around them. A substance that is a gas can change to a liquid, and a liquid substance can change to a gas.



SOLAR PLASMA

The glowing corona of the Sun visible during a total eclipse is made of a fourth state of matter called plasma. Plasma is formed when a lot more energy is given to a gas, such as by heating the gas or passing electricity through it. This extra energy splits the particles of the gas into even smaller pieces so hot that they glow.


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Answer 2

★ Hi , there !! ★



here is your answer !!!


for change in our state we used following symbols :-


for solid we use ( s )


for liquid ( l )


for gas ( g )



for aqous ( aq )

there is change of substance from one state to another state




it can also commination as well as decomposition reaction




following are the example of some reactions :-




H2( g ) + O2 (g )====> H20 ( l )




hydrogen is a gas and oxygen is also a gas when they combine to form hydrogen oxide which is a liquid




★ NH3 ( g ) + HCL ( g ) =====> NH4Cl ( s )




hope it helps you dear !!!

thanks !!!