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Showing posts from June 28, 2009

Electron spin resonance(ESR).

Since electrons possess spin,they behave as spinning magnets and so will tend to orient themselves in an applied magnetic field. The spin of one election of a covalant pair and its interaction with a magnetic field is cancelled by the equal and opposite spine of its partner.An unpaired electron,however, will have an interaction that is not cancelled out.If a molecule contains only one unpaired electron, then the spin number can be either +1/2 -1/2. Thus there are only two orintations possible,

<<>>Gases<<>>

Examine the properties of real & ideal gases.Perform calculation using the ided gas law . Dalton's low , Graham's law & van der waals Equation.Learn to prepare gase in the lab.