LATENT HEAT OF WATER PRACTICAL

• • set up a heater attached to a voltmeter and ammeter
  • place it in a funnel above a beaker
  • measure the beaker's mass and record
  • put some crushed ice into the beaker and find the mass of it
  • put it in the funnel with the heater
  • switch the stopwatch on and heater at the same time, wait 3 minutes
  • record the mass of the beaker plus water
• Energy from the heater:

  • E = I x V x t
  • energy = current x PD x time
  • J = A x V x s
  • joules = amps x volts x seconds
• if energy transfer was 100% efficient, all the energy from the heater would be transferred to the ice
• we assume:

  • energy from heater = mass x Latent heat of fusion
  • E = mL