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- 1. Multiple Choice
The graph shows the cooling curve of a substance. At which stages the specific latent heat released?
AB and CD
BC and DE
AB and EF
BC and CD
- 2. Multiple Choice
Calculate the amount of energy required to freeze 98.0 grams of water?
32732J
146.3J
11690J
39939.9J
- 3. Multiple Choice
How many Joules of energy are required to make 100 grams of ice at 0 οC completely melt?
200 J
400 J
33,400 J
2,000,000 J
- 4. Multiple Choice
How many joules are required to boil 75 grams of water?
25050J
169500J
31350J
10000J
- 5. Multiple Choice
Heat of vaporization is for which phase changes? You may select more than one answer.
condensation
melting
freezing
evaporation
- 6. Multiple Choice
Heat of fusion is for which phase changes? You may select more than one answer.
condensation
melting
freezing
evaporation
- 7. Multiple Choice
Calculate the amount of energy required to melt 35.0 grams of ice.
79100J
146.3J
11690J
39939.9J
- 8. Multiple Choice
When do you use 334 J/g? You may select more than one answer.
if a substance is condensing
if a substance is freezing
if a substance is evaporating
if a substance is melting
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