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Heat Capacity
When an object is heated, its molecules absorb heat energy which increases their kinetic energy and causes them to move faster, raising the temperature of the substance. Heat capacity is defined as the amount of energy needed to raise the temperature of a substance by 1 degree Celsius or Kelvin, while specific heat capacity refers to the energy needed to raise the temperature of 1 kilogram of a substance by 1 degree. Specific heat capacity is calculated by dividing the total energy by the mass and temperature change.
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Introductory slide for heat capacity concepts in pure physics.
Heating results in molecular motion increase, converting heat energy to kinetic energy and raising temperature.
Heat capacity is the energy required to increase a substance's temperature by 1°C or 1K.
Heat capacity unit is J/K or J/°C, calculated as total energy change over temperature change.
Specific heat capacity is the energy needed to raise the temperature of 1kg of a substance by 1°C.
Specific heat capacity unit is J/(K·kg), calculated as total energy over mass and temperature difference.
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Heat Capacity
- 1. HEAT CAPACITY SEC3 PURE PHYSICS
- 2. Heating on aMolecular Level When an object is heated, its molecules will absorb the heat energy This heat energy is converted to kinetic energy Enabling the molecules to move faster With the increase in speed of the molecules, we would see a temperature rise of the substance
- 3. Heat Capacity Heatcapacity is defined as the amount of energy needed to raise the temperature of a substance by 1 o C or 1K.
- 4. Calculating Heat CapacityUnit for heat capacity: J/K or J/ o C Heat capacity Total Energy Difference/Change in temperature
- 5. Specific Heat CapacitySpecific heat capacity is defined as the amount of energy needed to raise the temperature of 1kg of the substance by 1 o C or 1K.
- 6. Calculating Specific HeatCapacity Unit for Specific Heat Capacity: JK -1 kg -1 Specific heat capacity Total energy mass Change/ difference in temperature