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WorksheetsLatent Heat and Specific Heat capacity
Total questions: 20
Worksheet time: 14mins
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 amount of heat required to change the phase of a substance depends on two factors which are
surrounding temperature
temperature change
material
the mass
specific latent heat of vaporisation is
the amount of heat required to change 1 kg of the substance from the solid to liquid phase without change in temperature
the amount of heat required to change 1 kg of the substance from the liquid to gaseous phase without change in temperature
the amount of heat required to change the temperature 1 kg of the substance by 1 degree Celcius
the symbol for specific latent heat is
c
L
Q
m
What is the formula to calculate specific latent heat of vaporisation?
L = Q/m
c = Q/(mΔƟ)
Q = mcΔƟ
Q = mL
Water molecules have the greatest kinetic energy in
Ice at 0 ⁰C
Water at 90 ⁰C
Water at 373 K
Steam at 150 ⁰C
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
Calculate the energy absorbed by 30 g of 100 ⁰C water that is turned into 100 ⁰C.
67 800 J
6 7800 J
678 J
67.8 J
Choose the correct characteristics of a solid. (More than 1 answer)
Fixed shape and volume
Strong forces of attraction between particles
in lattice
atoms only vibrates
particles slide past each other when receives heat.
What is the difference between liquid and gas in terms of the intermolecular forces?
Liquid has a weaker attractive forces compared to gas
Gas almost has no intermolecular forces
Liquid has stronger intermolecular forces than solid
Both lquid and gas has about the same intermolecular forces
Choose the best answerS. (More than 1 answer)
The diagram shows that
Gas molecule that moves in random motion.
Due to repeated random collisions with other gas molecules, constantly change the direction they move in.
This is a Brownian motion
This motion shows that particle of gas is so small.
This is a diagram of ice. Ahmad measures the temperature of ice. After some time, he notices the ice melts. When the temperature of melting ice is measured, he found that _______________________________.
The temperature is the same as the ice.
The temperature is lower than the ice.
This is a diagram of ice. Ahmad measures the temperature of ice. After some time, he notices the ice melts.
Choose the best statement related to the melting ice.
The temperature is not the same as the ice.
the temperature remains constant even though heat is being supplied continually.
Heat that is absorbed during melting is the specific latent heat
The quantity of heat, Q that is absorbed or released during a change of phase of 1 kg of the substance without any change in its temperature.
This is the definition of
Specific latent heat
Latent heat
Specific heat capacity
Heat capacity
Specific latent heat of fusion is the quantity of (a) that is absorbed during melting of 1 kg of a substance without any change in temperature.
Name the process at QR
melting
boiling
condensation
freezing
Which statement best describe the process at ST
there is no change in temperature because the heat that released to strengthened the bond between the molecules
there is no change in temperature because the heat is absorbed to weaken the bond between the molecules
there is no change in temperature because the heat that released to weaken the bond between the molecules
there is no change in temperature because the heat that absorbed to weaken the bond between the molecules
Solid starts to melt at
P
Q
R
S
