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# Preliminary chemistry

## Module 3 | Water

### Focus 5: Water has a higher heat capacity than many other liquids

#### Lesson 1 | Heat capacity of water

• Explain what is meant by the specific heat capacity of a substance.

• Compare the specific heat capacity of water with a range of other solvents.

• Explain why water’s ability to absorb heat is important to aquatic organisms and to life on earth generally.

• Explain what is meant by thermal pollution and discuss the implications for life if a body of water is affected by thermal pollution.

#### Lesson 2 | Measuring energy changes

• Explain how water’s ability to absorb heat is used to measure energy changes in chemical reactions.

• Explain and use the equation:

• Describe dissolutions which release heat as exothermic and give examples.

• Describe dissolutions which absorb heat as endothermic and give examples.

#### Lesson 3 | Investigating calorimetry

• Choose resources and perform a first-hand investigation to measure the change in temperature when substances dissolve in water and calculate the molar heat of solution.

• Process and present information from secondary sources to assess the limitations of calorimetry experiments and design modifications to equipment used.

• ### 60 Lessons

Lessons by expert teachers that cover the NSW Preliminary Chemistry Syllabus comprehensively.

• ### 60 Practice questions

60 lesson quizzes that include a variety of questions. This course also includes 20 focus level and 4 module level tests, as well as a comprehensive end of course practice exam.

• ### 51 Hours of video

Videos that fully explain complex chemistry questions through animation, practical experiments, and tutorials.

• ### 21 Interactive activities

Interactive activities that help you explore and understand key syllabus dot point as well as additional resources such as an interactive Periodic Table.