Which observation most strongly supports the conclusion that a specimen of…
CHEMISTRY · Single correct · AP · Chemistry · Properties of Substances and Mixtures · Properties of Substances and Mixtures
Problem
Which observation most strongly supports the conclusion that a specimen of polystyrene is predominantly amorphous?
(a) It exhibits birefringence when viewed between crossed polarizers.
(b) It shows a distinct enthalpy of fusion peak in its DSC curve.
(c) It softens gradually over a 30∘C temperature interval rather than melting sharply at one temperature.
(d) It conducts electricity when doped with iodine.