WorksheetsUnit 8: Energy
Total questions: 40
Worksheet time: 27mins
The amount of heat gained or lost by a substance depends on all of the following EXCEPT
The change in temperature of the substance.
The change in volume of the substance.
The mass of the substance.
The specific heat capacity of the substance.
A reaction that gives off heat is known as a(n) ___________ reaction.
Calorimetry
Endothermic
Exothermic
Kilogram
According to the law of conservation of energy
The amount of energy created is equal to the amount of energy destroyed.
Potential energy is neither created nor destroyed.
Energy cannot be converted from one form to another.
The energy of the universe is constant.
Ability to do work and produce heat.
work
system
energy
heat
Stored energy
potential energy
kinetic energy
temperature
surroundings
energy of motion
work
kinetic energy
heat
specific heat capacity
force acting over a distance
kinetic energy
heat
temperature
work
measuring the change of heat in a chemical reaction
heat
specific heat capacity
calorimetry
surroundings
energy needed to raise temperature of 1 g of a substance 1oC
Specific heat capacity
heat
exothermic
endothermic
How many joules of energy would be required to heat 24.2 g of carbon from 23.6oC to 54.2oC?
(Specific heat capacity of carbon= 0.71 J/g oC.)
532 J
430 J
530 J
530 g
Usually harvested below houses.
Plant Biomass
Ground Source Geothermal Energy
Hydropower
Solar Energy
Best source is switchgrass.
Plant Biomass
Wind Energy
Solar Energy
Ground Source Geothermal Energy
Turns mechanical energy into electrical energy
Hydropower
Solar Energy
Wind Power
Wind Energy
A liquid with a specific heat of 1.90 J/g oC has 4750 J of heat energy added to it. If the temperature increases from 18oC to 25oC, what is the mass of the liquid?
361 g
230 g
360 g
350 g
The amount of energy needed to heat 2.00 g of carbon from 50.0oC to 80.0oC is 42.6 J. The specific heat capacity of the sample of carbon is
0.355 J/g oC
0.710 J/g oC
639 J/g oC
2556 J/g oC
A 5.10-g sample of iron is heated from 36.0oC to 75.0oC. The amount of energy required is 89.5 J. The specific heat capacity of this sample of iron is
17800 J/g oC
11.7 J/g oC
0.450 J/g oC
0.900 J/g oC
The specific heat capacity of iron is 0.45 J/g oC. How many joules of energy are needed to warm 1.50 g of iron from 20.00oC to 29.00oC?
5 J
6 J
6.1 J
6.5 J
Which of the following is exothermic?
A reaction in which the products are higher in potential energy than the reactants.
The melting of a solid.
Burning propane.
Rolling a ball up a hill.
Energy as heat flows into a system.
system
Endothermic
Exothermic
surroundings
Energy as heat flows out of a system
Exothermic
temperature
Endothermic
heat
A 500. g piece of aluminum increases its temperature 7oC when heat energy is added. How much heat energy produced this change in temperature? (s=0.89)
310 J
3000 J
300 J
30 J
A volume of water has a mass of 500. g. If the temperature of this amount of water was raised by 7oC, how much heat energy is produced? (s=4.184)
10000 J
1000 J
200 J
10000 g
How much heat energy is required to raise the temperature of 1 kilogram of carbon by 10oC? (s=0.71)
.712 J
7000 J
7000 g
7100 J
How much heat energy is needed to raise the temperature of 57 g of water from 10oC to 25oC?
4000 g
3600 J
3670 J
4000 J
What is the specific heat of a material that gains 180. joules of energy when a 0.25-kilogram object increases in temperature by 3oC? What is this material?
gold
silver
iron
aluminum
A liquid with a specific heat of 1.90 J/g oC has 4,750 joules of heat energy is added to it. If the temperature increases from 20oC to 30oC, what is the mass of the liquid?
30 g
450 g
300 J
300 g
What is the mass of a block of iron that gains 52,800 joules of energy when its temperature is increased by 5oC? (s=0.45)
2000 g
1999 g
20000 g
3000 g
A scientist wants to raise the temperature of a 100.g sample of ice from -45oC to 15oC. How much heat energy is required to produce this change in temperature? (s=2.03)
122 J
12000 J
1300 J
120 J
A 250.g sample of aluminum is provided with 5,000 joules of heat energy. What will be the change in temperature of this sample of aluminum? (s=0.89)
120oC
23oC
20oF
20oC
As a ball rolls down a hill, the potential energy_______ and the kinetic energy_______.
decreases, increases
decreases, decreases
increases, increases
increases, decreases
The remainder of the universe.
surroundings
temperature
system
calorimetry
Portion of the universe in which you are interested.
surroundings
work
system
heat
Measure of the random motions of molecules and atoms of a substance.
heat
work
kinetic energy
temperature
Flow of energy due to temperature differences.
work
system
heat
temperature
Most are harvested on farms.
plant biomass
kinetic energy
calorimetry
work
Usually harvested on the roof of a home or business.
wind energy
hydropower
ground source geothermal energy
solar energy
harvested in dams, tidal barrages, or wave farms.
solar energy
ground source geothermal energy
hydropower
wind energy
Batteries can store energy for when the sun sets.
wind energy
ground source geothermal energy
solar energy
hydropower
The Anasazi Indians first harvested this energy by building south-facing homes.
solar energy
hydropower
wind energy
plant biomass
Can be dangerous to wildlife.
ground source geothermal energy
wind energy
solar energy
plant biomass
