WorksheetsPHYSICS SHC SPECIFIC HEAT CAPACITY AND SLH SPECIFIC LATENT H
Total questions: 46
Worksheet time: 36mins
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 symbol for specific latent heat is
c
L
Q
m
Water molecules have the greatest kinetic energy in
Ice at 0 ⁰C
Water at 90 ⁰C
Water at 373 K
Steam at 150 ⁰C
How much energy is needed to raise the temperature of 5.0 grams of lead from 25°C to 35°C? [specific heat (c) = 0.129 J/(g•°C)]
6.45 J/(g•°C)
6.45 J
16.1 J/(g•°C)
d.16.1 J
Which of the following best explains why the sand at the beach is hotter than the water?
Sand has a higher specific heat than water.
Sand has a lower specific heat than water.
There is more water than sand at the beach.
There is more sand than water at the beach.
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
Find the energy released by a copper block when it is cooled from 100°C to 20°C. Given that the heat capacity of the block is 770 J°C-1.
7.70x104 J
8.61x104 J
6.16x104 J
5.02x104 J
Which of the following statements is correct?
The unit of heat capacity is J kg-1 °C-1.
Specific heat capacity measures the temperature variations when 1J of energy is absorbed.
The unit of specific heat capacity is J kg-1 K-1.
Specific heat capacity equals to the heat content of an object.
When an electric heater is supplied with an electric power of 2.0 kW to heat 4.0 kg of water for 1 minute, calculate the increase in temperature of the water. Assume that the specific heat capacity of water is 4200 J kg-1 0C-1 and there is no heat loss to the surroundings.
3.050C
7.10C
140C
300C
Danny pours some 95°C water into a cup of instant noodles. The final temperature of the mixture is 85°C. If the masses of the hot water and noodles are 500 g and 150 g respectively, find the specific heat capacity of the noodles.
Give that the original temperature of the noodles is 25°C and the specific heat capacity of the water is 4200 J kg-1 °C-1.
500 J kg-1 °C-1
1.08 x 103 J kg-1 °C-1
2.33 x 103 J kg-1 °C-1
6.00 x 103 J kg-1 °C-1
In order to make a cup of milk coffee at 78°C, 200 g of coffee is mixed up with 40 g of milk. If the original temperature of the coffee is 80°C, find the original temperature of the milk. Assume that there is no heat lost to the surroundings. Given that the specific heat capacity of coffee and milk are 4000 J kg-1 °C-1 and 3900 J kg-1 °C-1 respectively.
10.3°C
20.7°C
45.2°C
67.7°C
Gas is trapped in a closed container. There exists gas pressure inside the container because gas molecules
move randomly.
move with equal speed.
collide with one another.
collide constantly with the walls of container.
Given that the specific latent heat of fusion of a sample is 550 kJ kg-1. Which of the following is correct?
The mass of this sample is 1 kg.
The energy needed to increase the temperature of 1 kg of this sample in solid state through 1oC is 550 kJ.
The energy needed to increase the temperature of 1 kg of this sample in liquid state through 1oC is 550 kJ.
The energy needed to change 1 kg of the material from solid state to liquid state is 550 kJ.
Find the energy released by 0.3 kg of a liquid sample at 200oC to change to its solid state at 50oC. Given that the specific heat capacity of the sample in solid state and liquid state are 770 J kg-1 oC-1 and 900 J kg-1 oC-1 respectively.
The melting point of the sample is 100oC and the specific latent heat of fusion of it is 10 kJ kg-1.
4.17 x 103 J
8.86 x 103 J
2.10 x 104 J
4.16 x 104 J
If 5.0 x 105 J of energy is absorbed by a block of ice when it is heated from -5oC to 0oC, find the mass of the ice.
Given that the specific heat capacity of ice is 2.05 x 103 J kg-1 oC-1 and the specific latent heat of fusion of ice is 3.34 x 105 J kg-1.
1.45 kg
2.56 kg
3.01 kg
3.27 kg
Regarding to the fixed points in Celsius scale, which of the following is correct?
The upper fixed point is the freezing point of water and the lower fixed point is the boiling point of water.
The upper fixed point is the boiling point of methane and the lower fixed point is the freezing point of methane.
The upper fixed point is the boiling point of water and the lower fixed point is the freezing point of ice.
The upper fixed point is the melting point of ice and the lower fixed point is the freezing point of ice.
Regarding to the fixed points in Celsius scale, which of the following is correct?
The upper fixed point is the freezing point of water and the lower fixed point is the boiling point of water.
The upper fixed point is the boiling point of methane and the lower fixed point is the freezing point of methane.
The upper fixed point is the boiling point of water and the lower fixed point is the freezing point of ice.
The upper fixed point is the melting point of ice and the lower fixed point is the freezing point of ice.
