A substance has a melting point of 20°C and a heat of fusion of 3.4
× 10
4 J/kg. The boiling point is

and the heat of vaporization is

at a pressure of one atmosphere. The specific heats for the solid, liquid, and gaseous phases are 600 J/kg ∙ K (solid), 1000 J/kg ∙ K (liquid), and 400 J/kg ∙ K (gaseous). How much heat is required to raise the temperature of

of this substance from

to

at a pressure of one atmosphere?
◦ 190 kJ
◦ 320 kJ
◦ 260 kJ
◦ 230 kJ
◦ 92 kJ