Specific Latent Heat

• Specific latent heat


  The amount of energy required to change the state of one kilogram of substance with no change in temperature
• Specific latent heat of fusion

  The energy required to change 1 kilogram of a substance from a solid to a liquid with no change in temperature
• Specific latent heat of vaporization

  The energy required to change one kilogram of a substance from a liquid to a vapor with no change in temperature
• Calculating energy change for change of state

  Energy for change of state (J) = Mass (kg) x Specific latent heat (J/kg)
• Calculating energy to convert 0.5 kg of ice to liquid water

  • Energy = 0.5 kg x 334,000 J/kg = 167,000 J
• Calculating energy to convert 0.15 kg of ethanol from liquid to vapor

  • Energy = 0.15 kg x 846,000 J/kg = 126,900 J