Specific latent heat

• • Changing state causes energy to be supplied to internal energy but not temperature
• • Specific latent heat is the amount of energy required to change state of one kilogram of substance with no change in temperature
  • E = mL
• • Specific latent heat of fusion - solid to liquid
  • Specific latemt heat of vaporisation - liquid to gas
• • Melting/boiling substances uses energy
  • So, internal energy increases
  • Energy used to break bonds between particles and not temperature
• • Condensing/freezing substances releases energy because bonds are formed
  • Internal energy decreases but temperature does not go down