Quantity of heat

• Temperature


  The degree of hotness or coldness of a body
• Heat


  The form of energy that flows from a body at a higher temperature to a body at a lower temperature
• Principal of conservation of energy


  Energy can neither be created nor destroyed but can be converted from one form to another
• Effects of heat on a substance

  1. Change of temperature of body
  2. Change in state of body
• Heat capacity


  Amount of heat required to raise the temperature of a given mass of a substance by 1 Kelvin
• What happens when the temperature of a body is raised

  Heat energy is absorbed by the body
• What happens when the temperature of a body is lowered

  Heat energy is released by the body
• Specific heat capacity


  Amount of heat energy required to raise the temperature of a unit mass of a substance by 1 Kelvin
• Specific latent heat of fusion

  Amount of heat energy required to change a unit mass of a substance from solid to liquid without change in temperature