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Investigating the factors affecting how quickly hot water cools.

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  • Essay length: 1055 words
  • Submitted: 27/08/2003
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GCSE Green Plants as Organisms

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Investigating the factors affecting how quickly hot water cools.

Aim: -to sees how quickly water-cools after boiling at different volumes of water with lids on.

Background: - heat can be lost in many ways and also gain. In human we gain heat by chemical reactions happening mostly in contracting cells of active muscle and the cells of the liver. We also gain it from the sun, which is absorbed through the skin and by eating hot food and drinks.

Heat is lost to the air by exposed surfaces of the body by conduction convection and radiation. Heat is also lost by evaporation. The cold air we breathe in and cold food and drinks products absorb heat and take heat away. We also lose or gain heat by moving into a colder or warmer place or by taking off or putting on a piece of clothing and to take exercise to keep warm.

WHAT HAPPENS TO MOLECULES WHEN THEY ARE HEATED?

When molecules are heated the molecules vibrate faster and faster and kinetic energy of the particles increases. In the end they have so much kinetic energy that the particles begin to separate

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