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Matter In Our Surroundings
How are particles of matter affected with increasing or reducing pressure on the matter at a given temperature ?
On increasing pressure, particles of a matter come closer and these move apart on reducing pressure at a given temperature. Thus if pressure is increasingly applied on a gas, particles of the gas come closer and closer and eventually the gas may change into liquid and then solid form. Fig. shows three cylinders in which a matter is present as gas, liquid and solid.
Changing state of matter on application of pressure : (a) solid; (b) liquid; (c) gas.
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Convert the following temperatures to Kelvin scale.
35°C
Give reason for the following observations.
Naphthalene balls disappear with time without leaving any solid.
Give reason for the following observations.
We can get the smell of perfume sitting several metres away.
What is the physical state of water at
a) 25°C
b)00C
c)1000C
What is the physical state of water at
0°C
What is the physical state of water at
100°C
Give two reasons to justify
Water at room temperature is a liquid.
Give two reasons to justify
An iron almirah is a solid at room temperature.
Why is ice at 273K more effective in cooling than water at the same temperature ?
What produces more severe burns, boiling water or steam ?
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