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physicsRP1 · EnergyPaper 1Combined and Separate

Specific heat capacity

Method overview

Measure block mass, insert heater and thermometer with good thermal contact, insulate, record initial temperature, supply measured electrical energy, record temperature over time and calculate c = E/(mΔT).

Apparatus set-up

Diagram
Heater in metal block
Temperature probe
Timer

metal block; heater; insulation; thermometer/probe; joulemeter or ammeter/voltmeter; balance; stopwatch

Independent variable

energy supplied or material

Dependent variable

temperature change and calculated specific heat capacity

Control variables

mass; insulation; heater power; starting temperature; contact

Apparatus

metal block; heater; insulation; thermometer/probe; joulemeter or ammeter/voltmeter; balance; stopwatch

Safety

Heater/block become hot; switch off before handling; check leads and use low voltage.

Scientific rationale

Insulation reduces energy loss; thermal paste reduces air gaps; electrical energy is estimated by E = VIt or joulemeter.

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