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Worksheets4.3 Specific latent heat
Total questions: 10
Worksheet time: 33mins
There are four main processes in changing of phase, and they are
Melting
Boiling
Condensation
All the above
Latent heat is
the heat absorbed or released at a boiling process during a change of phase
the heat absorbed or released at a constant temperature during a change of phase
the heat absorbed or released at a constant temperature during a change of phase of 1 kg object
the heat absorbed or released by an object to increase or decrease its temperature by 1 degree Celcius
The heat absorbed by melting a solid is known as
latent heat of fusion
latent heat of solid
latent heat of liquid
latent heat of vaporisation
the symbol for specific latent heat is
c
l
Q
m
What is the formula to calculate specific latent heat of vaporisation?
l=mQ
c = Q/(mΔƟ)
Q = mcΔƟ
Q=ml
Consider the following temperature-time graph when a solid is heated. which part of the graph involves latent heat of vaporization?
Part I
Part II
Part III
Part IV
The graph shows the cooling curve of a substance. At which stages the specific latent heat released?
AB and CD
BC and DE
AB and EF
BC and CD
What is evaporation?
a gas turns into a liquid
a liquid turns in to a gas
a solid turns into a liquid
a liquid turns into a solid
What is condensation?
a gas turns into a liquid
a liquid turns into a gas
a solid turns into a liquid
a liquid turns into a solid
The constant temperature at which solid converts into liquid is called
boiling point
variable point
holding point
melting point
