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Heat of Fusion & Heat of Vaporization: Definitions & Equations

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question 1 of 3

Calculate how much heat energy (q) is needed to melt 10 grams of gold at its melting point. Note: gold has a heat of fusion of 15.4 cal/g.

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1. Calculate how much heat energy is required to turn 100 grams of iron into a gas at its boiling point. The heat of vaporization for iron is 69.1 cal/g.

2. What takes more energy: changing a liquid to a gas or changing a solid to a liquid?

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About This Quiz & Worksheet

Believe it or not, but you encounter the heat of fusion and heat of vaporization every day! Find out what you know by completing the worksheet and quiz pairing. Some quiz questions ask you to complete calculations to correctly identify heat energy.

Quiz & Worksheet Goals

Take the quiz to test yourself on these key concepts and ideas:

  • Energy needed to change a liquid into a gas through boiling
  • Heat energy needed to melt or boil different metals
  • Amount of energy that changes a solid into a liquid

Skills Practiced

Utilize the quiz and worksheet to assess your ability to implement these skill sets:

  • Reading comprehension - ensure that you draw the most important information about the heat of fusion and heat of vaporization from the related lesson
  • Making connections - use your knowledge of energy to understanding if going from liquid to gas or solid to liquid requires more energy
  • Problem solving - use acquired knowledge to solve a problem asking how much heat energy is needed to turn 100 grams of iron into gas at its boiling point
  • Knowledge application - use your knowledge to answer questions about changing the state of solids, liquids, and gases

Additional Learning

Review the video lesson entitled Heat of Fusion & Heat of Vaporization: Definitions & Equations to learn more. Learning objectives met in the lesson include:

  • Learn the real-world names typically used to describe fusion and solidification
  • Differentiate between calories (lower case c) and Calories (upper case C)
  • Understand formulas to find heat of fusion and heat of vaporization
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