Question

The magnetic susceptibility of a paramagnetic material at - 73 °C is 0.0075. Its value at -173 °C will be ______.

Options

• 0.0045

• 0.0030

• 0.0150

• 0.0075

Answer 1

The magnetic susceptibility of a paramagnetic material at - 73 °C is 0.0075. Its value at -173 °C will be 0.0150.

Explanation:

`chi prop 1/"T"`

`chi_1/chi_2 = "T"_2/"T"_1`

T₁ = 273 - 73 = 200, T₂ = 273 - 173 = 100

`therefore chi_2 = "T"_1/"T"_2 xx chi_1`

`= 200/100 xx 0.0075`

= 0.0150