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17 questions
Specific latent heat is the amount of energy required to change the state of 1 kg of a substance without changing its ___________.
Select the state changes that latent heat of fusion applies to.
melting
evaporating
freezing
condensing
sublimation
Select the state changes that latent heat of vaporisation applies to.
melting
evaporating
freezing
condensing
sublimation
Select the correct equations.
thermal energy = specific latent heat / mass
thermal energy = specific latent heat x mass
mass = specific latent heat / thermal energy
specific latent heat = thermal energy / mass
mass = specific latent heat x thermal energy
The diagram shows a heating curve for ice. Which line represents the ice melting?
A
B
C
D
E
Why are lines B and D flat?
The ice is melting
The ice is freezing
All of the thermal energy is used to break the bonds
They stopped the stopwatch
They stopped heating the ice.
The diagram shows a heating curve for ice. Which line represents the ice in a liquid state (water)?
A
B
C
D
E
The diagram shows a cooling curve for ice. Which line represents the ice in a liquid state (water)?
A
B
C
D
E
The diagram shows a cooling curve for ice. Which line represents the ice freezing?
A
B
C
D
E
The diagram shows a cooling curve for ice. Which line represents the ice in a solid form?
A
B
C
D
E
Specific heat capacity is the amount of energy required to increase the temperature of 1 kg of a substance by 1°C without changing its _____.
The unit of specific heat capacity is J/kg°C.
True
False
The specific heat capacity of water is 4200 J/kg°C. How much energy is needed to raise the temperature of 1 kg of water by 1°C?
The specific heat capacity of water is 4200 J/kg°C. How much energy is needed to raise the temperature of 2 kg of water by 1°C?
The specific heat capacity of water is 4200 J/kg°C. How much energy is needed to raise the temperature of 0.5 kg of water by 1°C?
The specific heat capacity of water is 4200 J/kg°C. How much energy is needed to raise the temperature of 2 kg of water by 2°C?
Which of these substances is the best conductor of heat?
Water (s.h.c = 4200 J/kg°C)
Copper (s.h.c = 390 J/kg°C)
Mercury (s.h.c = 139 J/kg°C)
Air (s.h.c = 718 J/kg°C)
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