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Properties
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- Slide: 1
- Overall, water is vital for our health and the Earth's well-being, and it is all because of water's polar covalent bonds and hydrogen bonds!
- Moving on from water's importance, let's learn about water properties! In fact, we already mentioned some, such as universal solvent, surface tension, cohesion, and adhesion! Now, we will learn about density and high specific heat capacity.
- Hi! Water is everywhere and you will always see us!
- Slide: 2
- Let's talk about water density.
- The first property is "Ice is less than dense than water." This occurs due to my polarity! Polarity causes hydrogen bonds to form, and in ice, these bonds force the molecules into a rigid, crystalline structure. The reduced molecular packing causes ice to be less dense than water.
- Hey, that's me and ice cubes!
- This is why ice floats on water! When you dunk ice cubes in your water glass, it will always rise to the surface
- Slide: 3
- On to the second property: High specific heat capacity
- High specific heat capacity means that it requires a large amount of energy to raise my temperature. That means I'm the most powerful molecule, haha!
- This property occurs due to polarity, which form hydrogen bonds and cohesion (water molecules attract to other water molecules). When energy is added to water, it is intended to break the hydrogen bonds. However, the bonds between oxygen and hydrogen are strong, meaning that it will take larger heat/energy for them to break.
- This allows water to store a lot of heat! It takes 4184 joules of energy to raise the temperature of 1 kilogram of water by 1 degree celsius
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