Predict the change in molecular kinetic energy
and particle arrangement of molten steel (liquid) after
becoming completely solid.

a. Decrease in average molecular kinetic energy and
decrease in average distance between particles.

b. Decrease in average molecular kinetic energy and
increase in average distance between particles.

c. Increase in average molecular kinetic energy and
decrease in average distance between particles.

d. Increase in average molecular kinetic energy and
increase in average distance between particles.