4.3.2.2

4.3.2.2 Temperature changes in a system and specific heat capacity

4.3.2.2 Temperature changes in a system and specific heat capacity

Content

If the temperature of the system increases, the increase in temperature depends on the mass of the substance heated, the type of material and the energy input to the system.

The following equation applies:

change in thermal energy = mass × specific heat capacity

MS 1a, 3b, c, d

Students should be able to apply this equation, which is given on the Physics equation sheet, to calculate the energy change involved when the temperature of a material changes.

This equation and specific heat capacity are also included inEnergy changes in systems.

E=mcθ

change in thermal energy, ∆E, in joules, J

mass, m, in kilograms, kg

specific heat capacity, c, in joules per kilogram per degree Celsius, J/kg °C temperature change, ∆θ, in degrees Celsius, °C.

The specific heat capacity of a substance is the amount of energy required to raise the temperature of one kilogram of the substance by one degree Celsius.

WS 3.5 Interpreting observations and other data (presented in verbal, diagrammatic, graphical, symbolic or numerical form), including identifying patterns and trends, making inferences and drawing conclusions.

MS 1c - Use ratios, fractions and percentages

MS 3b Change the subject of an equation

MS 3c Substitute numerical values into algebraic equations using appropriate units for physical quantities

MS 3d -Substitute numerical values into algebraic equations using appropriate units for physical quantities

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