(a) A clinical thermometer has small temperature range. The glass will crack/burst due to excessive pressure created by expansion of mercury.
(b) Increase in pressure
(i) increases the boiling point;
(ii) decreases the melting point.
(c) At the boiling point of pure water, the saturated vapour pressure (s.v.p) of the water is equal to the external atmospheric pressure.
(d)
DiagramVolume V is proportional to length Ɩ stated or implied
(i) P\(_1\)V\(_1\) = P\(_2\)V\(_2\) implies P\(_1\)P\(_1\) = P\(_2\)P\(_2\)
(76 + 20) 15 = 76 x L\(_2\)
Ɩ\(_2\) =
96 x 15 76
Ɩ\(_2\) = 18.95 cm
(ii) P\(_1\)L\(_1\) = P\(_3\) L\(_3\)
= (76 + 20) 15 = (76 – 20) x Ɩ\(_3\)
Ɩ\(_3\) =
96 x 15 56
Ɩ\(_3\) = 25.7l cm
