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States of Matter
Why mercury is generally used as a liquid in barometer?
It is because of the following reasons:
(i) Mercury is non-volatile at ordinary temperature, therefore, the pressure exerted by the vapours above the mercury column is very small and can be neglected.
(ii) The height of the column in a barometer is inversely proportional to the density of the liquid. Since mercury is very dense, it is best for barometer as it supports column of convenient height.
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What does the abbreviation STP stand for?
What is atmospheric pressure?
Which state of matter has a definite volume but no definite shape?
What is absolute temperature?
What is the absolute zero temperature?
Can absolute zero temperature be attained for a gas?
How pressure of a given sample of gas is related to absolute temperature at constant volume?
How is the pressure of a gas related to the number of molecules of the gas at constant temperature and volume?
What is standard (or normal) temperature and pressure (STP)?
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