What happens to the mass and density of ice when it melts in a cup of water?

Question

The ice becomes the same temperature as the original cup of water.
I'm thinking the mass stays the same and the density increases.

As a continuation, when you crush a coke can, how does the density change?

Answer 1

The mass stays the same but the volume decreases. Since density is a relationship between volume and mass, the density increases. That's why ice floats on water.

Answer 2

The solid/fluid relationship of dihydrous oxide (ice/water) is peculiar in that it fails to follow normal temperature/density relationships. Normally density increases as temperature decreases but for water maximum density is 4 degrees Celsius (I think), which is about 39 degrees Fahrenheit. Since ice is less dense than water at that temperature, it floats, and I think the reason is due to the hydrogen bonding between water molecules. As ice melts its mass decreases and an equal amount of water mass increases, but the total ice/water mass remains constant. As for the crushed coke can, its density would have to increase, since density is defined as mass over volume (D=m/V). Since rewriting this equation (m=D*V) with mass held constant, as the volume decreases, density must increase.

Answer 3

whilst Ice melts in a cup of Water, the water point is going DOWN. whilst the Polar SEA ice melts the sea point will flow DOWN. observe I pronounced SEA Ice. no longer Land Ice, like on Greenland. If each and all of the Ice on Greenland Melted the sea point might upward thrust.

Answer 4

The volume Decreases while the mass will Stay the same.