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

question 90

Multiple Choice

A substance has a melting point of 20°C and a heat of fusion of 3.9 × 10⁴ J/kg.The boiling point is and the heat of vaporization is 7.8 × 10⁴ J/kg at a pressure of 1.0 atm.The specific heats for the solid,liquid,and gaseous phases are 600 J/(kg∙K) ,1000 J/(kg∙K) ,and 400 J/(kg∙K) ,respectively.The quantity of heat required to raise the temperature of of the substance from to at a pressure of 1.0 atm,is closest to

• A)620 kJ.
• B)470 kJ.
• C)560 kJ.
• D)210 kJ.
• E)770 kJ.

---

Definitions:

Formatting Instructions

Guidelines or commands that specify how data should be presented or formatted, often used in programming to improve the readability or appearance of output.

System.out.println

A Java statement used to print a line of text to the console or output stream.

Arguments

Values or variables passed to a function or method when it is called, used within the function to perform operations or calculations.

Java Package

A mechanism in Java used to group related classes and interfaces together, making the code easier to manage and modular.