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- 1. Multiple Choice
A student is cooking bacon in a pan on a stove top. What is the main method of heat transfer between the pan and the bacon?
Entropy
Radiation
Convection
Conduction
- 2. Multiple Choice
What condition is necessary for heat to flow between two objects?
They must be of the same mass
They must be of the same density
They must have different temperatures.
They must have different conductivity
- 3. Multiple Choice
What is the heat energy generated/emitted by the metal when a 250 kg lump of iron cools from 650° C to 20° C? Specific heat of iron is 449 J/kgC.
1,459,250,000 J
70,717,500 J
112,250 J
-70,717,500 J
- 4. Multiple Choice
The first law of thermodynamics, the internal energy of a system can either be increased by adding heat or doing work on the system, is a restatement of the ____.
Principle of entropy
Law of Conservation of energy
Law of heat addition
Law of potential energy
- 5. Multiple Choice
A student is investigating the best method for heating marshmallow using an open flame. The student quickly discovers placing the marshmallow over the flame is more effective than heating the marshmallow on the side of the flame.
According to this information, what type of heat transfer is present when the marshmallow is above the fire that is not present when the marshmallow is on the side of the fire?
Conduction
Convection
Entropy
Radiation
- 6. Multiple Choice
NASA developed a reflective foil barrier to help shield spacecraft from heat transfer in space. These reflective barriers are not used in homes to prevent heat transfer by the same method. What method of heat transfer is being prevented by the reflective barrier?
Entropy
Conduction
Convection
Radiation
- 7. Multiple Choice
What is the heat gained or lost when 20 kg of water experiences a change in temperature from 10° C to 40° C ? (Specific heat of water is 4186 J/kgC)
8000 J
- 8000 J
2,511,600 J
- 2,511,600J
- 8. Multiple Choice
A tray filled with ice is removed from the freezer. After a short period of time, the ice begins to melt. As the ice melts, it ―
decreases in specific heat capacity
increases in entropy
decreases in temperature
increases in temperature
- 9. Multiple Choice
A student that just received their driver’s license decides to buy a new car. He remembers from physics class that heat engines have a thermal efficiency that can be calculated. He asks the car deal for a car that has a high thermal efficiency rating. The car dealer says he has a car that is 100% efficient.
Which law of thermodynamics best describes why the car cannot be 100% efficient?
The zeroth law of thermodynamics
The second law of thermodynamics
The first law of thermodynamics
The third law of thermodynamics
- 10. Multiple Choice
A student is preparing to take a bath when she realizes that the hot water tap in the bathroom is not working. The student goes to the kitchen and prepares 20L of 100oC water to mix with 80L of 20oC . What will be the final temperature of the bath water?
36 oC
120 oC
15 oC
80 oC
- 11. Multiple Choice
How much heat is lost when a 64 g piece of copper cools from 375oC, to 26oC? (The specific heat of copper is 0.38452 J/g xoC)
-8588.63 J
-1500.86 J
8588.63 J
-3845.2 J
- 12. Multiple Choice
If 100 grams of water is to be heated from 24.0°C to 100.0°C to make a cup of tea, how much heat must be absorbed? The specific heat of water is 4.184 J/g·°C
F G H J
- 51,881.6 J
31,798.4 J
- 31,798.4 J
51, 881.6 J
- 13. Multiple Choice
When it burns, a candle heats 45 grams of water from 21 to 28 C. How much energy did the candle give off? Specific heat of water is 4.184 J/gC
- 1317.96 J
1317.96 J
9225.72J
- 9225,72 J
- 14. Multiple Choice
100.0 mL of 4.0°C water is heated until its temperature is 37°C. If the specific heat of water is 4.184 J/g°C, calculate the amount of heat energy needed to cause this rise in temperature.
- 13, 807.2 J
13, 807.2 J
17, 154.4 J
- 17, 154.4 J
- 15. Multiple Choice
__________ is the amount of energy that must be added to a material to raise one unit of mass by one temperature unit.
Temperature
Specific Heat
Radiation
Hotness
- 16. Multiple Choice
Thermodynamics is the study of __________.
Heat
Light
Stars
Sound
- 17. Multiple Choice
In which direction does thermal energy flow?
From hot to cold
From cold to hot
From light to dark
Either from hot to cold or from cold to hot
- 18. Multiple Choice
Absolute zero is __________.
273.15 K
273.15 F
-273.15 C
-273.15 K
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