Plug and Chug
1.
Q = mc?T
Q = (500g)(1cal/g°C)(50°C) = 25000 calories
Ans: 25000 calories
2.
Q = mc?T
Q = (500g)(1cal/g°C)(50°C-20°C) = 15000 calories
Ans: 15000 calories
3.
Q = mc?T
Q = (30g)(0.11cal/g°C)(100°C-30°C) = 231 calories
Ans: 231 calories
6.
c = Q/m?T
c = 735cal/(50g)(100°C-30°C) = 0.21
Ans: 0.21cal/g°C
Think and Explain
6. Because act has high uper specific heat capacity.
7. A 10-kilogram jug of sweltry body of water because it has higher specific heat capacity.
14. A high specific heat capacity because it can store much energy.
15. More likely.
Think and Solve
2.
Tfinal= m1T1+m2T2/?T
1000g(20°C)+2000g(40°C)/3000g ? 33.3
Ans: About 33.3°C
4.
Q = mc?T
Q = (400g)(1cal/g°C)(22°C-20°C) = 800 calories
c = Q/m?T
c = 800cal/(50g)(100°C-22°C) = 0.2051282051 ? 0.21
Ans: About 0.21 cal/g°C
Chapter 22 Review
Review Questions
1. They conduct heat well.
2. Because it is a profound conductor of heat.
3. A conductor transfer heat easily but an insulator delay the transfer of heat.
4. Because there be lots of air spaces in those materials.
7. Because the land is warmer than the water in the day and cooler than the water at night.
8.
As the gas expands, it cools and its temperature rises when it is compressed.
10. Any energy, including heat, that is transmitted by radiation is called refulgent energy.
11. Objects at low temperatures emit long waves, and higher-temperature objects emit waves of shorter wavelengths.
12. Because a good absorber of refulgent energy reflects very little radiant energy, including the range of radiant energy we call light.
14. Good emitter.
15. A black pot of hot tea.
16. In a snappy room.
Think and Explain
2. No. Cold doesnt flow but the heat escapes.
3. Because iron is a good conductor of heat.
4. wild air has a lower density than cold air, do it rise. The holes allow for hot air to rise from the bulb, while new-fangled cooler air is pulled in from the bottom of the lamp.
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