The magnetic susceptibility of a paramagnetic substance at `-73^@C` is `0*006`. What will be its value at `-173^@C`?

Answer

`0*012`

Explanation

Here, `T_1=-73^@C=-73+273=200K`
`chi_1=0*006, chi_2=?, T_2=-173+273=100K`
As `chi_2/chi_1=T_1/T_2=200/100=2`
`:. chi_2=2chi_1=2xx0*006=0*012`