Specific Latent heat

• What is the specific latent heat of a substance?

  It is the energy required to change the state of 1 kilogram of it without a change in temperature.
• What happens to the temperature of a substance during a change of state?

  The temperature remains constant during the change of state.
• How much energy is required to boil 1 kg of water at 100° C?

  1. 26 Megajoules (MJ).
• What does the specific latent heat of fusion describe?

  It describes changes from solid to liquid.
• What is the specific latent heat of fusion of water?

  334 kJ.
• What does the specific latent heat of vaporization describe?

  It describes changes from liquid to gas.
• What is the specific latent heat of vaporization of water?

  1. 26 Megajoules (MJ).
• How can we accurately measure latent heat?

  • Record the energy given to a heater during the change of state.
  • Use an electronic heater for faster heating.
  • Collect melted water in a beaker placed on a pan balance.
  • Determine energy used by the electrical power of the heater.
  • Calculate latent heat by dividing energy by mass.
• What is the relationship between the mass of ice melted and the mass of water collected?

  The mass of ice melted is the same as the mass of water collected.
• What should you be familiar with for your exam regarding latent heat measurement?

  • The experiment measuring latent heat.
  • The use of a heater and pan balance.
  • The calculation of latent heat from energy and mass.
• What is the purpose of the Launchpad learning platform mentioned in the material?

  To help students achieve top results in their exams through interactive learning.
• What types of resources does the Launchpad learning platform offer?

  Interactive quizzes, easy-to-follow videos, and AI tutor support.
• How does the AI tutor on the Launchpad learning platform assist students?

  By providing support and motivation throughout the learning process.