Curriculum
Science — Second Preparatory
Unit 1: Matter and Energy
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Unit 2: Matter and Chemical Reactions
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Unit 3: Energy Flow in Photosynthesis and Respiration
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Unit 4: Geological Processes
0/4
Text lesson
Internal Energy and Temperature
Internal Energy and Temperature
Specific heat capacity and heat
Specific heat capacity and heat
- The specific heat capacity of a substance is the heat needed to raise the temperature of 1 kg of it by 1 °C.
- Different substances have different specific heat capacities.
- Water has a large specific heat capacity (4200 J/(kg·°C)), so it needs a lot of heat to warm up and cools down slowly.
- The heat gained or lost by a substance is calculated from:
- Q = m × c × ΔT
- Q is the heat in joules (J).
- m is the mass in kilograms (kg).
- c is the specific heat capacity in J/(kg·°C).
- ΔT is the final temperature minus the initial temperature.
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