A-Level Biology OCR A
Water Molecules Energy Ice 4*C Hydrogen Bonds Liquid
| Front |
Why does ice float in water? |
| Back |
Why ice floats:- As water cools down, the kinetic energy the molecules have gets reduced - they move less and therefore take up less space
- Above 4*C, interactions between molecules are short, hydrogen bonds keep forming and breaking quickly
- Below 4*C, the energy of water molecules falls below the energy of hydrogen bonds - they form much more frequently than they break
- This causes a lattice to be formed where the molecules are more spread out than in liquid water - less dense than disordered liquid water therefore it floats
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Water habitat high thermal stability due hydrogen bonds
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A-Level Biology OCR A