(a(i))[2]
State what melting point means.
(a(ii))[3]
Using ideas about molecules, describe what changes happen as the liquid evaporates.
(b(i))[1]
Suggest where evaporation takes place in the apparatus shown in Fig. 10.1.
(b(ii))[3]
State and explain the benefit of a vacuum between the two glass walls.
(c(i))[1]
State what the bubbles contain.
(c(ii).1)[3]
Calculate the thermal energy (heat) lost by the metal as it cools.
(c(ii).2)[2]
Calculate the mass of nitrogen that evaporates.