Which Ice Melts The Fastest. One reason calcium chloride melts ice the fastest is because when the reaction occurs, the heat energy that is released helps melt the ice along with the other chemicals in the calcium chloride. The shape of the rectangular ice cube is the flattest and has the most surface area.

In this activity you tried adding salt, sugar or sand to ice to see whether the substance would help melt the ice. It is highly corrosive and damages. Thus, crushed ice melts faster, giving the effect of cooling faster.