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This quiz contains 12 questions from a mix of 1 subtopics.
Which of the following defines specific latent heat?
the energy needed to raise the temperature of a substance by 1°C
the heat capacity of a system
the difference in temperature between two states of matter
the energy needed to change the state of a substance without changing its temperature
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How is specific latent heat of vaporisation for water experimentally determined?
by measuring the temperature change of boiling water
by measuring the energy required to melt a known mass of ice
by measuring the energy required to vaporise a known mass of water
by calculating the difference in energy between liquid water and water vapor
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What is the role of specific latent heat in changing water from solid to liquid?
it determines the mass
it determines the energy required
it determines the final temperature
it determines the rate of change
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Which formula relates energy change, mass and specific latent heat?
E = mL
pV = nRT
E = mcT
F = ma
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What is the term used to describe the energy required to change a solid into a liquid?
latent heat of sublimation
latent heat of vaporisation
sensible heat
latent heat of fusion
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What would the specific latent heat of fusion be for a substance if 143,000 J of energy melted 2 kg of it?
715 J kg-1
71,500 J kg-1
285,500 J kg-1
2 J kg-1
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What are the key steps carried out when determining specific latent heat of vaporisation for water experimentally?
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How much energy is required to melt 2 kg of ice at 0°C? The specific latent heat of fusion for water is 334 kJ kg-1.
1,336 kJ
668 J
668 kJ
670,000 J
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Calculate the energy required to vaporise 0.75 kg of water. The specific latent heat of vaporisation for water is 2,260 kJ kg-1.
1,700 kJ
2,995 kJ
1,695 kJ
1,990 kJ
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What is the energy required to change 0.5 kg of ethanol from liquid to gas? The specific latent heat of vaporisation for ethanol is 840 kJ kg-1.
420 J
420 kJ
1,680 kJ
840 kJ
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A student wishes to determine the specific latent heat of fusion of ice experimentally. If 250 g of ice melts after receiving 83,500 J of energy, what is the specific latent heat of fusion calculated from this experiment?
83.5 kJ kg-1
334 kJ kg-1
345 kJ kg-1
270 kJ kg-1
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If 1.2 kg of a substance requires 302,400 J of energy to vaporise, what is its specific latent heat of vaporisation?
25.2 kJ kg-1
252 kJ kg-1
302.4 kJ kg-1
252 J g-1
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