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AS level Chemitsry
- Thread starter Junaid456
- Start date
It is one of the simple topic, Examiner Only focus about ideal and real behavior of gases. Just 2 assumptions of kinetic theory are most important, anyhow, i have notes but bad luck my scanner is not working, about any serious issue, u can discuss, i ll try to explain.
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An ideal gas is one that behaves all the postulates of Kinetic theory of gases .e.g. elastic collisions, negligible forces and negligible volume. It obeys the ideal gas equation , PV = nRT
A non-ideal gas or a real gas does not obey the ideal gas equation or postulates of the kinetic theory of gases. A real gas has forces existing between its molecules/ atoms. And collisions are not perfectly elastic, Ke before collision is not equal to Ke after collision.
A real gas can be made ideal at high temperature and low pressure. Both conditions result in negligible forces of attraction b/w gas particals + negligible volume of gas particles as compared to the volume of vessel.
Increase in relative molecular/atomic mass of the gas changes a gas from ideal to a non-ideal one. Since, increase in Mr or Ar results in increased van der Waal forces, so increasing the attraction b/w gas particles thereby nullifying one of the postulates of the Kinetic theory of gases.
Hope that's enough
A non-ideal gas or a real gas does not obey the ideal gas equation or postulates of the kinetic theory of gases. A real gas has forces existing between its molecules/ atoms. And collisions are not perfectly elastic, Ke before collision is not equal to Ke after collision.
A real gas can be made ideal at high temperature and low pressure. Both conditions result in negligible forces of attraction b/w gas particals + negligible volume of gas particles as compared to the volume of vessel.
Increase in relative molecular/atomic mass of the gas changes a gas from ideal to a non-ideal one. Since, increase in Mr or Ar results in increased van der Waal forces, so increasing the attraction b/w gas particles thereby nullifying one of the postulates of the Kinetic theory of gases.
Hope that's enough
http://www.chemguide.co.uk/CIE/index.html
go here it contains perfect notes...trUst me!!!
go here it contains perfect notes...trUst me!!!