Latent Heat
Physics ⇒ Heat and Thermodynamics
Latent Heat starts at 8 and continues till grade 12.
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See sample questions for grade 9
A 100 g sample of water at 100°C is converted to steam at 100°C. How much heat is required? (Latent heat of vaporization = 2260 J/g)
A 150 g sample of water at 100°C is converted to steam at 100°C. How much heat is required? (Latent heat of vaporization = 2260 J/g)
A 20 g sample of ice at 0°C is converted to water at 0°C. If the latent heat of fusion is 334 J/g, how much heat is absorbed?
A 200 g block of ice at 0°C is to be converted to water at 0°C. How much heat is needed? (Latent heat of fusion = 334 J/g)
A 250 g sample of ice at 0°C is melted to water at 0°C. How much heat is required? (Latent heat of fusion = 334 J/g)
A student heats a beaker of ice at 0°C. The temperature does not rise until all the ice melts. What is the reason for this observation?
Calculate the amount of heat released when 50 g of steam at 100°C condenses to water at 100°C. (Latent heat of vaporization of water = 2260 J/g)
Calculate the mass of ice that can be melted by 1670 J of heat. (Latent heat of fusion of ice = 334 J/g)
Describe the difference between latent heat of fusion and latent heat of vaporization.
Describe what happens to the energy supplied to a substance during a phase change.
Describe what happens to the temperature of a substance during freezing.
Explain why frost forms on a cold surface even when the air temperature is above the freezing point of water.
Explain why steam at 100°C can cause more severe burns than boiling water at 100°C.
Explain why the temperature does not rise during the boiling of water, even though heat is being supplied.
Explain why the temperature of a substance does not change during melting or boiling, even though heat is being supplied.
The latent heat of fusion of ice is 334 J/g. How much heat is required to melt 10 g of ice at 0°C?
What is latent heat?
