What does the symbol -δhfus indicate in a phase change?
a gas is being formed.
a gas is being liquefied.
a solid is being formed.
a liquid is being vaporized.

6. using 3 – 4 sentences explain (in your own words) why water expands when it freezes? 7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation.