Heat!
Heat MCAS Review
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1. A student touches a metal sink with her finger and notices that her finger feels cold. Which of the following statements explains this observation? *
1 point
2. The molecules in which of the following have the greatest average molecular kinetic energy? *
1 point
3. The specific heat of wood is about 1,700  . How much energy is required to heat a 12 kg piece of wood from 20°C to 30°C? *
1 point
4. In which of the following examples is heat transferred primarily by radiation? *
1 point
5. A large container of cold water is moved from a refrigerator to a table. A hot piece of metal is placed into the water. Which of the following best describes the final temperature of the metal? *
1 point
6. A balloon is inflated with room-temperature air and then put in a sunny place. The balloon expands slightly due to a rise in temperature. Which of the following best describes the molecules of air inside the balloon when the balloon is left in the sunlight as compared to when it was first inflated? *
1 point
7. Which of the following is an example of heat transfer by conduction? *
1 point
8. Two blocks of zinc with different masses are at room temperature. Each block then absorbs the same amount of heat over 10 minutes. When the temperature of each block is then measured, block 1 is at a higher temperature than block 2. Which of the following statements most likely describes the zinc blocks? *
1 point
9. Which of the following statements best explains why there is no change in temperature once thermal equilibrium between two objects in contact is reached? *
1 point
10. The graph below shows how the temperature of a sample of water changes as energy is added to the sample.
During which interval does a gas form? *
1 point
11. Sunlight warms an area of Earth’s surface. Winds then carry thermal energy from this area to another location.Which two heat transfer processes are primarily involved in this situation? *
1 point
12. If the temperature of a gas in a closed container increases, which of the following also happens? *
1 point
13. Frozen food is submerged in a small insulated container of 95°C water. Which statement best describes the temperature of the food after two hours, assuming no heat is lost outside of the insulated container? *
1 point
14. A student heats 200 g of water from 20°C to 70°C. How much heat did the student add to the water if the specific heat for water is 4.2 J/g • °C? *
1 point
15. Thermal energy is added to a sample of 15°C water. Which of the following quantities must increase? *
1 point
16. A student slowly heats a beaker of a liquid on a hot plate. The liquid has a boiling point of 78°C. The student makes the graph shown below from the data she records as the liquid is heating.
Which of the following statements best describes what happens to the molecules of liquid between 5 and 10 minutes of heating? *
1 point
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