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 regarding energy?

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

  Temperature remains constant during state change
• What is latent heat?

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

  Energy 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 between liquid and gas states
• What is the specific latent heat of fusion?

  Energy change between solid and liquid states
• What is the specific latent heat of fusion for water?

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

  2,260,000 joules per kilogram
• How much energy is required to boil 2.5 kg of water?

  5,650,000 joules
• What happens to energy during cooling when changing states?

  Energy is released when new bonds form
• What is the equation for specific latent heat?

  Energy = mass × specific latent heat
• How can the specific latent heat equation be rearranged?

  Energy = mass × SLH
• How does the process of heating ice differ from boiling water?

  Heating ice involves melting, boiling involves vaporization
• What should you do with specific latent heat figures in an exam?

  They will be provided in the exam
• What keeps the temperature constant during a state change?

  Energy used to break or form bonds
• What happens to the temperature of water at 0 degrees Celsius during melting?

  Temperature remains constant until all ice melts
• What is the total energy required to heat 1 kg of ice from -50°C to 150°C?

  It includes energy for melting and boiling
• How does the energy requirement differ for melting and boiling water?

  Boiling requires more energy than melting
• What is the significance of the graph showing temperature changes with time?

  It illustrates temperature changes during state changes
• What is the role of specific latent heat in calculations?

  It helps calculate energy for state changes
• Why is the temperature constant during a state change?

  Energy is used to change the state, not temperature
• How does the energy change during cooling differ from heating?

  Cooling releases energy, heating absorbs energy
• What is the energy change when water vapor condenses?

  Energy is released during condensation
• What happens to the energy supplied at the boiling point?

  It breaks bonds, keeping temperature constant
• What is the specific latent heat of fusion for water?

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

  2,260,000 joules per kilogram
• How much energy is needed to boil 2.5 kg of water?

  5,650,000 joules
• What is the relationship between mass and specific latent heat?

  Energy depends on mass and specific latent heat
• How does the energy change during melting compare to boiling?

  Melting requires less energy than boiling
• What is the significance of the specific latent heat values in exams?

  They are provided for calculations
• What happens to the temperature of water at 100 degrees Celsius during boiling?

  Temperature remains constant until all water boils
• How does energy transfer during state changes affect temperature?

  Energy transfer keeps temperature constant
• What is the overall effect of heating on a substance's internal energy?

  Heating increases internal energy until state change
• What is the energy change when ice melts at 0 degrees Celsius?

  Energy is absorbed to break bonds
• What is the role of specific latent heat in phase transitions?

  It quantifies energy needed for phase changes
• What is the energy required to change 1 kg of water from liquid to gas?

  2,260,000 joules
• How does the energy requirement differ for melting and freezing?

  Both require the same amount of energy