GCSE Physics (AQA)

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Specific Heat Capacity of Water

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Particle model of matter Internal energy and energy transfers

Specific Heat Capacity of Water

1:54 Heating to Change Temperature
Spec 4.1.1.3 4.3.2.2
Previous Calculating Change in Temperature Next Heating & Change of State
  • The specific heat capacity of water is 4,200 joules per kilogram degree Celsius.
  • Water's heat capacity is much higher than that of metals (below 1000) and wood (around 2000).
  • Water's high heat capacity has practical uses, such as:
  • Regulating body temperature, as the human body is about 60% water.
  • Preventing sudden temperature changes during exercise, allowing time to cool down.
  • Slowing heat loss in cold conditions, giving time to warm up before freezing.
  • In homes, hot water is used in heating systems:
  • Water is heated in a boiler and circulated through pipes and radiators.
  • Water retains heat during transport, minimizing thermal energy loss.
  • The high specific heat capacity of water aids in efficient heating systems by reducing heat loss.
  • For exams, understanding the concept of water's high specific heat capacity is important, though specific applications may not need to be memorized.

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