A) Container A B) Container B C) Container C D) Container D E) Their temperature

Question

       A) Container A
       B) Container B
       C) Container C
       D) Container D
       E) Their temperatures change by the same amount.

Four identical closed, insulated containers hold equal amounts of water at a temperature of 50° C. One kilogram of ice at 0° C is added to the water in container A; one kilogram of steam at 100° C is added to container B. One kilogram of water at 0° C is added to the water in container C; one kilogram of water at 100° C is added to the water in container D. After all the ice has melted and all the steam has condensed, and all the water is evenly mixed, which container’s temperature will have changed more?

Explanation / Answer

Of course, it is just a battle of ice vs steam, as they have to involve change in state.

However, for a fact, steam has greater heat of vaporization than the heat of fusion of ice.

Thus, the container with steam wins. The answer is CONTAINER B. [ANSWER]

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