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 12
A 100 g sample of a substance at its boiling point absorbs 180,000 J of heat to become vapor. What is its latent heat of vaporization?
A 150 g sample of a substance at its melting point requires 45,000 J to melt completely. What is the latent heat of fusion of the substance?
A 200 g sample of water at 100°C is converted to steam at 100°C. If the latent heat of vaporization is 2,260,000 J/kg, how much heat is required?
A 250 g sample of a substance at its melting point requires 50,000 J to completely melt. What is its latent heat of fusion?
A 50 g sample of ice at 0°C is converted to water at 0°C. How much heat is required? (Latent heat of fusion = 334,000 J/kg)
A block of ice at 0°C is placed in a calorimeter. If 33,400 J of heat is supplied, how much ice (in grams) will melt? (Latent heat of fusion = 334,000 J/kg)
Calculate the amount of heat required to convert 500 g of ice at 0°C to water at 0°C. (Latent heat of fusion of ice = 334,000 J/kg)
Describe the role of latent heat in the water cycle.
Describe what happens to the temperature of a substance during a phase change when latent heat is supplied.
Explain the difference between latent heat of fusion and latent heat of vaporization.
Explain why steam at 100°C causes more severe burns than boiling water at 100°C.
Explain why the temperature of a boiling liquid does not rise even though heat is continuously supplied.
If 100 g of steam at 100°C is condensed to water at 100°C, how much heat is released? (Latent heat of vaporization = 2,260,000 J/kg)
State the SI unit of latent heat.
The process of sublimation involves which type of latent heat?
