year 9 specific latent heat

• What concept is discussed in today's video?

  Specific latent heat
• What happens to particles as a substance is heated?

  Particles gain energy in their kinetic energy store
• How does temperature relate to internal energy?

  Temperature measures average internal energy of particles
• What occurs during a change in state when heating a substance?

  Energy weakens or breaks forces between particles
• What happens to temperature during a state change?

  Temperature remains constant until state change completes
• What is the latent heat?

  Energy required to change state without temperature change
• What does specific latent heat (SLH) refer to?

  Energy required to change 1 kg of substance's state
• What are the two types of specific latent heat?

  Latent heat of vaporization and fusion
• What is the specific latent heat of vaporization?

  Energy change when a substance changes between liquid and gas
• What is the specific latent heat of fusion?

  Energy change when a substance changes between solid and liquid
• What happens to the temperature of water at 0 degrees Celsius during melting?

  Temperature remains constant while melting occurs
• What is the specific latent heat of fusion for water?

  334,000 joules per kilo
• What is the specific latent heat of vaporization for water?

  2,260,000 joules per kilo
• How much energy is required to boil 2.5 kg of water at 100 degrees Celsius?

  5,650,000 joules
• What does the equation for specific latent heat state?

  Energy = mass × specific latent heat
• What is the energy released during cooling when changing states?

  It is the specific latent heat value
• How does cooling differ from heating in terms of state change?

  Cooling involves bond formation, releasing energy