Question

Calculate the heat energy released when 29.9 g of liquid mercury at 25.00 °C is converted to solid mercury at its melting point. Constants for mercury at 1 atm answer in kJ

Answer 1

Heat released when liquid mercury at 25.00 ℃ is converted to solid at melting point.

Constants for mercury are,

Heat capacity, C=0.14 J/g℃

Heat of fusion, H_fusion=11.3 J/g

Melting point of mercury=-38.83 ℃

Heat released=m(CdT+ H_fusion)

                                =29.9*(0.14*(25.00-(-38.83))+11.3)=605.0 J

                                =0.605 kJ