A substance has a melting point of 20°C and a heat of fusion of .The boiling point is 150°C and the heat of vaporization is at a pressure of 1.0 atm.The specific heats for the solid,liquid,and gaseous phases are , ,and ,respectively.The quantity of heat given up by 0.50 kg of the substance when it is cooled from 170°C to 88°C,at a pressure of 1.0 atmosphere,is closest to
A) 70 kJ.
B) 14 kJ.
C) 21 kJ.
D) 30 kJ.
E) 44 kJ.

Question

A substance has a melting point of 20°C and a heat of fusion of  .The boiling point is 150°C and the heat of vaporization is  at a pressure of 1.0 atm.The specific heats for the solid,liquid,and gaseous phases are  ,  ,and  ,respectively.The quantity of heat given up by 0.50 kg of the substance when it is cooled from 170°C to 88°C,at a pressure of 1.0 atmosphere,is closest to
A) 70 kJ. 
B) 14 kJ. 
C) 21 kJ. 
D) 30 kJ. 
E) 44 kJ.

Quizplus · Accepted Answer

The Answer of A substance has a melting point of 20°C and a heat of fusion of  .The boiling point is 150°C and the heat of vaporization is  at a pressure of 1.0 atm.The specific heats for the solid,liquid,and gaseous phases are  ,  ,and  ,respectively.The quantity of heat given up by 0.50 kg of the substance when it is cooled from 170°C to 88°C,at a pressure of 1.0 atmosphere,is closest to
A) 70 kJ. 
B) 14 kJ. 
C) 21 kJ. 
D) 30 kJ. 
E) 44 kJ.

A Substance Has a Melting Point of 20°C and a Heat