how does impurities affect time taken for ice to melt?

Question

how does impurities affect time taken for ice to melt? will it be faster or slower? plz provide explanation. THANKS-

Answer 1

Water has colligative property so any ions added will depress it melting/freezing point and will cause it to melt faster. Although on the solution's phase diagram, the solidus remains fixed and isotherm, the latent heat of freezing may increase with the added ions because of the adding of minor phases. However, the melting occurs faster because of the increase in supper heating temperature gap.

Proofs may be that we use salt sodium chloride to melt ice on walkways. Adding a salt that gives more ions in water solution, e.g. calcium chloride should make the ice melt even faster.

Answer 2

Impurities in ice will make the time it takes to melt longer. Ice particles find something to stick to that does not melt instead of sticking to a fellow ice particle that will melt at the same time.

There are some studies and researches around the issue. A building brick composed of ice and wood particles can keep its strength and shape for a long time in cold weather, its even stronger than common building bricks.

Hope this was sufficient.

Answer 3

Impurities will raise the melting point of ice. Thus the temperature at which ice melts will become higher. The time taken will depend on the power = energy/time that you are giving to the ice. The higher the power supplied the lesser time it will take.

Answer 4

the impurities in your ice take energy to heat up too, there for you need to supply more energy to heat up the ice and impurities. i