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Latent Heat

Physics ⇒ Heat and Thermodynamics

Latent Heat starts at 8 and continues till grade 12. QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Latent Heat. How you perform is determined by your score and the time you take. When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 10
A 0.1 kg sample of a substance requires 33,400 J to melt at its melting point. What is its specific latent heat of fusion?
A 0.25 kg block of ice at 0°C is melted and then heated to 50°C. How much heat is required for the melting process only? (Latent heat of fusion of ice = 334,000 J/kg)
A 0.5 kg sample of a substance requires 167,000 J to melt at its melting point. What is its specific latent heat of fusion?
A 1 kg sample of a substance absorbs 2,260,000 J of heat at its boiling point. What is the latent heat of vaporization?
A 2 kg block of ice at 0°C is melted completely. How much heat is required? (Latent heat of fusion of ice = 334,000 J/kg)
A 200 g sample of a substance requires 44,800 J to vaporize at its boiling point. What is its specific latent heat of vaporization?
A student heats 250 g of ice at 0°C until it melts completely. How much energy is absorbed? (Latent heat of fusion of ice = 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)
Define the term 'specific latent heat'.
Describe the role of latent heat in the refrigeration 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 can cause more severe burns than boiling water at 100°C.
Explain why the temperature of boiling water does not rise above 100°C at standard atmospheric pressure.
If 100 g of steam at 100°C is condensed to water at 100°C, how much heat is released? (Latent heat of vaporization of water = 2,260,000 J/kg)
State the SI unit of latent heat.
What is latent heat?