1. Heat energy will flow from a large steel block to a small copper block in contact with each other until
- A. the blocks are at the same temperature
- B. the blocks contain the same internal heat energy
- C. the molecules in both blocks have the same momentum when they collide
- D. the blocks have the same heat capacity
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2. Absolute zero is
- A. -273 K
- B. 0 K
- C. -100 K
- D. 373 K
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3. A temperature of 300 K is equivalent to
- A. 573 0C
- B. 27 0C
- C. 373 0C
- D. -27 0C
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4. When steam at 1000C condenses and turns into water at 1000C :-
- A. The internal energy has increased and thermal energy is released to the surroundings
- B. The internal energy has remained constant and thermal energy is released to the surroundings
- C. The internal energy has remained constant and thermal energy is transferred from the surroundings to the steam
- D. The internal energy has decreased and thermal energy is released to the surroundings
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5. When ice melts at 00C , bonds between molecules are weaker. This leads to
- A. an increase in potential energy between the water molecules
- B. a decrease in potential energy between the water molecules
- C. an increase in the kinetic energy of the water molecules
- D. a decrease in the kinetic energy of the water molecules
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6. The mole is defined as:
- A. 6.02 x 10 23 molecules / atoms of a substance
- B. The amount of substance with the same number of atoms as 6g of carbon-12
- C. The number of molecules or atoms with the same relative molecular mass as carbon-12
- D. 12g of carbon-12
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7. Helium has a molecular mass of 4. In a sample of 1kg of helium there are
- A. 400 moles
- B. 250 moles
- C. 0.4 moles
- D. 0.25 molesS
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8. You are more likely to receive a serious burn from holding 1kg of steel at 800C than 1g of iron at 4000C because
- A. steel has a higher specific heat capacity than iron
- B. the molecules of steel have a higher kinetic energy
- C. the steel has a higher internal energy than the iron
- D. the temperature difference between steel and iron is large
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9.Two metal blocks initially at room temperature are heated. Using data from the diagram, the temperature increase of block Y must be
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Block X |
Block Y |
Mass = m |
Mass = 6m |
Specific heat capacity=c |
Specific heat capacity=c/2 |
Heat energy supplied =Q |
Heat energy supplied = 24Q |
temperature increase = T |
Temperature increase = ? |
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10. The thermal capacity of an object is defined as
- A. the energy required to raise the object's temperature by 1k
- B.the energy required to raise the temperature of 1kg by 1k
- C. the temperature rise required to increase the object's thermal energy by 1J
- D. the temperature rise required to increase the thermal energyof 1kg by 1J
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