If reactive bond energy is 6 energy units and the product bond energy is 16 energy units, the net bond energy is 16 and the reaction is .

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.