If three 10 ml syringes A, B and C are taken and their nozzles closed by inserting a rubber cork. The space inside the syringes is filled with water, air and common salt respectively and then pistons pushed back into the syringes after applying a little of vaseline for smooth movement. On compressing, the piston A moves easily in first syringe and B moves very slowly, almost negligibly. a) Are the above mentioned observations correct? b) Justify your answer of part a) according to property of respective substances filled.
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Answer:
A):
No,the observations are incorrect.
Explanation:
B):
In syringe A water is there as we know water has a medium amount of intermolecular force and little spaces between the particles. Thus the compressibility is negligible.
In Syringe B air is there so the piston will move easily as we know that air is highly compressible.This is because particles of air are highly spaced and have weak intermolecular force.
In syringe C salt particles are there and they are solid.Solids have strong forces of attraction and the atoms are tightly packed together.Thus syringe C will not be compressed.
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