Specific Heat Capacity

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  • The specific heat capacity is the amount of energy needed to raise the temperature of 1 kg of a substance by 1°C.
  • ΔE=\Delta E =mcΔΘ mc \Delta Θ
    • Change in thermal energy (J)
    • Mass (kg)
    • Specific heat capacity (J/kg°C)
    • Temperature change (°C)
  • Practical Method
    • To measure the specific heat capacity a block of the substance is needed with a hole for the heater and thermometer
    • Measure the mass of the block and then wrap it in a insulating layer to prevent heat lost to the environment
    • Measure the initial temperature and the and set the power supply to 10 volts, turn on and start a stopwatch
    • The current does work on the heater transfering electric energy to thermal energy
    • Measure the temperature of the block every minute for 10 minutes
    • Repeat with different material to compare specific heat capacity