Answer:
The specific heat capacity of liquid and the het of vaporization is used.
.
Explanation:
Step 1: Data given
A substance at temperature 2°C.
The substance has a melting point of −10°C and a boiling point of 155°C.
The initial temperature is 2°C which is between the melting point (-10°C) and the boiling point (155°C). At 2°C, the substance is liquid.
At 155°C, the substance changes from liquid to gas.
To calculate the heat gained for the change of 2°C liquid to 155°C liquid, specific heat capacity of the liquid (C) is needed.
To calculate the heat gained for the change of liquid to 155°C gas, heat of vaporization (D) is needed.
The <u>specific heat of the solid is not used</u> because the substance is changed from liquid to gas. it doesn't come in the state of solid.
<u>Heat of fusion is not used</u>, because it's used when there is a change from its state from a solid to a liquid,
<u>The specific heat capacity of the gas is not used</u>, because the substance only formes gas after reaching 155 °C