Answer to Question #149304 in Molecular Physics | Thermodynamics for Nis

Question

Liquid of mass 2.5 kg at temperature 20 degree celsius is heated to 40 degree Celsius find the difference intensities at this temperature if its density at 20 °C is 13.6gm/cm^3

Answer 1

It is mercury.

$$\Delta \rho=\rho_{20}-\rho_{40}=\rho_{20}\left(1-\frac{1}{1+\beta \Delta T}\right)\\ \Delta \rho=13.6\left(1-\frac{1}{1+(180\cdot10^{-6})20}\right)=0.0488\frac{g}{cm^3}\\ \Delta \rho=48.8\frac{kg}{m^3}$$