Question

Van der waals questions. ...Pc=a/(27)b×b orVc=3b or Tc= 8a/27Rb.....so a or b = what? ?

Answer 1

these are the formulae to calculate

critical temperature Tc

critical pressure Pc

critical volume Vc

of a gas where a nd b are constants having different values of different gases.

a is due to force of attraction and b due to the infinite size of molecules