1. Heat energy will flow from a hot small steel block to a cold large 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
2. Absolute zero is
• A. -273 K
• B. 0 K
• C. -100 K
• D. 373 K
3. A temperature of 300 K is equivalent to
• A. 573 0C
• B. 27 0C
• C. 373 0C
• D. -27 0C
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
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 6. The mole is defined as:

• A. The amount of substance with the same number of atoms/molecules as 12g of carbon-12
• B. The amount of substance with the same number of atoms/molecules as 6g of carbon-12
• C. The amount of substance with the same mass as 12g of carbon-12
• D. The amount of substance with the same mass as 6g of carbon-12
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 moles
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

9. Two metal blocks initially at room temperature are heated.

 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 = ? Using data from the diagram, the temperature increase of block Y must be
• A.8T
• B.4T
• C.2T
• D. T/2

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