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WONDERFUL WATER. WHAT IS WATER? How would you describe water to someone who has never seen it? Take a moment now in your groups to tackle this problem.

Published byThomas Stewart Modified over 8 years ago

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Presentation on theme: "WONDERFUL WATER. WHAT IS WATER? How would you describe water to someone who has never seen it? Take a moment now in your groups to tackle this problem."— Presentation transcript:

1 WONDERFUL WATER

2 WHAT IS WATER? How would you describe water to someone who has never seen it? Take a moment now in your groups to tackle this problem and then we will share your ideas.

3 INTRODUCTION TO WATER http://www.youtube.com/watch?v=nSENol WbyYQhttp://www.youtube.com/watch?v=nSENol WbyYQ

4 WHY IS WATER SO SPECIAL? http://www.youtube.com/watch?v=DAilC0s jvy0http://www.youtube.com/watch?v=DAilC0s jvy0

5 THERMOCHEMISTRY OF WATER Liquid water has a very high specific heat capacity – this means …. When ice melts, what happens? The energy that has to be added to ice to make it melt is called the enthalpy of fusion (Δ fus H). What is this added energy doing? Melting animation

6 Ice melting In your own words describe what is happening in this video clip at the molecular level.

7 Phase Changes When water (or any other substance) changes from one phase to another energy is either gained or lost. These energy changes are known as the enthalpy of fusion, the enthalpy of vapourisation and the enthalpy of sublimation. (Δ fus H, Δ vap H, Δ su H). When 1 mole of substance changes phase and the temperature remains constant it is called the molar enthalpy of…

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