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A 5 kg block of ice at 0°C is converted to water at 0°C. If the latent heat of f

Practice Questions

Q1
A 5 kg block of ice at 0°C is converted to water at 0°C. If the latent heat of fusion of ice is 334 kJ/kg, how much heat is absorbed?
  1. 1670 kJ
  2. 334 kJ
  3. 167 kJ
  4. 3340 kJ

Questions & Step-by-Step Solutions

A 5 kg block of ice at 0°C is converted to water at 0°C. If the latent heat of fusion of ice is 334 kJ/kg, how much heat is absorbed?
Correct Answer: 1670 kJ
  • Step 1: Identify the mass of the ice block. In this case, it is 5 kg.
  • Step 2: Identify the latent heat of fusion of ice. It is given as 334 kJ/kg.
  • Step 3: Use the formula for heat absorbed, which is Q = m * Lf, where Q is the heat absorbed, m is the mass, and Lf is the latent heat of fusion.
  • Step 4: Substitute the values into the formula: Q = 5 kg * 334 kJ/kg.
  • Step 5: Calculate the result: Q = 1670 kJ.
  • Latent Heat of Fusion – The amount of heat required to convert a unit mass of a solid into a liquid without a change in temperature.
  • Heat Transfer – The process of energy moving from one system to another, in this case, from the ice to the surroundings as it melts.
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