1. When ice melts at 0^{0}C , bonds between the water molecules are weaker. This leads to
 A. an increase in potential energy
 B. a decrease in potential energy
 C. an increase in the kinetic energy
 D. a decrease in the kinetic energy
 E. no changes to the potential or kinetic energy


2. When steam at 100^{0}C condenses and turns into water at 100^{0}C :
 A. The total internal energy has increased and thermal energy is released to the surroundings
 B. The total internal energy has remained constant and thermal energy is released to the surroundings
 C. The total internal energy has remained constant and thermal energy is transferred from the surroundings to the steam
 D. The total internal energy has decreased and thermal energy is transferred from the surroundings to the steam
 E. The total internal energy has decreased and thermal energy is released to the surroundings


3. The mole is defined as:
 A. The amount of any substance with the same number of molecules or atoms as 12g of carbon12
 B. The amount of any substance with the same number of molecules or atoms as 6g of carbon12
 C. The number of molecules or atoms with the same relative molecular mass as carbon12
 D. The number of molecules or atoms with the same relative molecular mass as 6g of carbon 12
 E. 12g of carbon12


4.Two metal blocks initially at room temperature are heated. Using data from the diagram, the temperature increase of block Y must be
 A.8T
 B.4T
 C.2T
 D. T/2
 E. T/4

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 = ? 


The graphs below show the temperature change of five 1 kg samples of solid substances as they are heated and melt. In all cases heat energy is supplied at a constant rate.
Which substance has 

5. The highest specific heat capacity when solid? 

6. The lowest latent heat of fusion? 

7. A lower specific heat capacity when solid than when liquid? 

8. The equation of state for an ideal gas is PV= nRT. In this formula, ‘n’ is the
 A. universal gas constant
 B. number of molecules of gas
 C. molar mass of the gas
 D. number of litres of gas
 E. number of moles of gas


9. A fixed mass of gas is trapped inside a cylinder of volume V at a temperature T and pressure P. The gas is compressed to a volume of V/8 and the temperature increases to 4T. The new pressure in the tank is
 A. 32P
 B. 8P
 C. 2P
 D. P/2
 E. P/32


10. A piston at a pressure of 100kPa is allowed to expand slowly, the volume increasing by 0.01m ^{ 3}. The work done by the gas is
 A. +1KJ
 B. 1KJ
 C. +1000kJ
 D. 1000kJ
 E. no work is done by the gas.


