- (D) H 2 O changes state at Parts B and D. The heat of vaporization at D
(540 cal/g or 2.26 × 10^3 J/g) is greater than the heat of fusion (80 cal/g or 3.34
× 10^2 J/g) at B.
(540 cal/g or 2.26 × 10^3 J/g) is greater than the heat of fusion (80 cal/g or 3.34
× 10^2 J/g) at B.