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A substance has a melting point of 20°C and a heat of fusion of
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 given up by
Of this substance when it is cooled from 170°C to 86°C at a pressure of one atmosphere?
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