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WorksheetsHeat capacity and specific heat capacity
Total questions: 56
Worksheet time: 1hrs 14mins
6200 J of heat is used to increase the temperature of a 1.2 kg metal block. The specific heat capacity of metal block is 450 J kg−1°C−1 . What is the rise in temperature of the metal block ?
9.6 ° C
11.5 ° C
15.0 ° C
360.0 ° C
Calorimetry Question:
A piece of metal with a mass of 32.8 g is heated to 100.5°C and dropped into 138.2 g of water at 20.0°C. The final temperature of the system is 30.2°C. What is the specific heat capacity of the metal?
2.56 J/g°C
0.391 J/g°C
5.29 J/g°C
3.50 J/g°C
What is the specific heat of an unknown substance if 100.0 g of it at 200.0 °C reaches an equilibrium temperature of 27.1 °C when it comes in contact with a calorimeter of water. The water weighs 75. g and had an initial temperature of 20.00 °C? (Specific heat of water is 4.18 J/g°C)
0.111 J/g°C
1.29 J/g°C
0.129 J/g°C
22225.85 J
If two objects have different temperatures when they come in contact, heat will flow from the warmer object to the cooler one UNTIL ____________
one reaches a temperature of zero
they both have an equal temperature
one runs out of energy
If the specific heat of water is 4.18 J/g∙°C, how much heat is required to increase the temperature of 1.2 kg of water from 23 °C to 39 °C?
-80,256 J
80.256 J
80,256 J
-80.256 J
What does a steep line show?
High specific heat capacity
Low specific heat capacity
Nothing to do with specific heat capacity
What is happening between A and B?
Melting
Boiling
Condensing
Freezing
None of these options
What is the quantity of heat required to raise the temperature of a substance by one degree?
Mass of the substance
Specific heat capacity of the substance
Heat capacity
Change in temperature
The amount of energy required to raise the temperature 1ºC for every gram is called____?
Thermal Energy
Specific Heat
Temperature
Kinetic Energy
A 20g stainless steel spoon at room temperature (20°C) is placed in 200mL of coffee at 70°C in a foam cup. Assume the foam cup doesn’t absorb any energy. Calculate the temperature when thermal equilibrium is established. The specific heat capacity of stainless steel is 500 J kg –1 K –1 .
68° C
21° C
70° C
45° C
A 70.0g copper block at a temperature of 80.0°C is placed in contact with another copper block of the same mass at a temperature of 20.0°C. Calculate the final temperature when the blocks have reached thermal equilibrium.
50° C
30° C
20° C
80° C
A piece of silver is heated to 87.36 oC and dumped into a calorimeter containing 65.86 g of water at a temperature of 24.03 oC. Calculate the mass of this zinc sample if the final temperature of the zinc and water together 28.69 oC. (Cp (silver) = .2350 J/g * oC)
93.11 g
48.26 g
110.6 g
86.5 g
the addition of 485 J of energy increases the temperature of a 47.3 g sample of a metal from 25.6oC to 45.3oC. What is the specific heat capacity of this metal?
.226 J/g*oC
.520 J/g*oC
.401 J/g*oC
.385 J/g*oC
10 kg of aluminium is heated from 120C to 220C. How much energy is needed?
8 970 000 J
897 J
8970 J
89 700 J
897 000J
Determine the heat energy needed to heat the water in the pot to boiling.
20 g of water. specific heat of water is 4.18 J/g°C. temperature changes from 25° C to 20° C, how much heat energy (Q) moves from the water to the surroundings?
418 J
209 J
83 J
4.18 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.
Which will heat up slower?
water
lead
granite
iron
Water molecules have the greatest kinetic energy in
Ice at 0 ⁰C
Water at 90 ⁰C
Water at 373 K
Steam at 150 ⁰C
What is the formula to calculate specific latent heat of vaporisation?
L = Q/m
c = Q/(mΔƟ)
Q = mcΔƟ
Q = mL
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 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
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
There are four main processes in changing of phase, and they are
Melting
Boiling
Condensation
All the above
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.
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
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
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
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.
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
20 g of water. specific heat of water is 4.18 J/g°C. temperature changes from 25° C to 20° C, how much heat energy (Q) moves from the water to the surroundings?
418 J
209 J
83 J
4.18 J
The specific heat(c) of copper is 0.39 J/g °C. What is the temperature change(∆t) when 100 Joules of heat(Q) is added to 20 grams?
12.82 °C
24.12°C
1.95 °C
5128 °C
Determine the heat energy needed to heat the water in the pot to boiling.
What letter is used to represent specific heat capacity?
H
P
C
T
