Which statement about the kinetic theory is not correct?

A.     The particles in ice vibrate about fixed points.

B.     The particles in steam have more energy than the particles in ice.

C.     All the particles in water have the same amount of energy at 298 K.

D.     Evaporation of water occurs at all temperatures between 273 K and 373 K when the atmospheric pressure is 101 kPa.

C

There were two G2 comments on this question both of which stated that this was a difficult question at SL. The question certainly was challenging and was found to be the third hardest question on the paper. However, 49% of candidates did manage to get the correct answer, C.