Which is heavier: an ice or liquid form of water?

Question

If you had 400 mL's of water in each of 2 containers and put one in the freezer and one in the fridge, which would weigh more after 3 hours? Why? Remember, the question is not about mass, volume, or density, but the actual weight.

Answer 1

Put them in a vacuum to simplify the problem. Outside of a vacuum, more air would be dissolved in liquid water near freezing (in the fridge) than in ice though the bubbles might be trapped (the bubbles would come from dissolved oxygen being displaced by the solid water) They would weigh pretty much the same with a probable trend for the fridge water to be slightly heavier because of the extra dissolved contaminants. However 400 cc's of ice weighs less than 400 cc's of water.

Answer 2

Your statement is completely wrong. Liquid water IS heavier than ice. Water at .01 degrees Celsius is 1.0 grams/cubic centimeter or 1.0 grams/milliliter. Ice is about .91 grams/milliliter so it floats. Water does in fact cause crustal depression but unlike glaciers that pile up ice higher than the topography (land surface). Ice can and does pile up more than a mile thick. The depth of the water in the great lakes and in fact the 4 quadrillion gallons in Lake Superior is far far less than the amount of water that was frozen in the glaciers of the last ice age (10-13000 years ago). Lake Superior can not hold any more water (minor variations excluded) because if you add more water, it will spill out through the St. Lawrence Seaway or if you added enough, it would go out the old stream channels formed when the glacial lakes were here (Glacial Lake Agassiz or Glacial Lake Duluth). The North Shore of Lake Superior is still experiencing crustal rebound. The reason you don't "see" the crustal depression or subsidence is because the ocean water has no place to go. It is the default condition of the ocean crust to be covered with water and the position of the crust reflects that. If you could somehow remove the water from the ocean basins you would in fact see the isostatic rebound occur.

Answer 3

From the phrasing of the question, the answer is that they weigh the same. Since matter is neither created or destroyed in the above experiment there are equal amounts of water molecules in the liquid water and frozen water, so the weight is the same. The density is less in ice than water, since water actually expands due to the properties of hydrogen bonding. One very intresting fact is that most compounds occupy less volume when frozen, but this is not the case for water.

Answer 4

You start out with the same mass and volume.



Density is mass divided by volume.



When water becomes ice, the density changes. We all know that ice is less dense than water because it floats. Well the mass didn't change. The volume changed (water expands as it freezes).



Heaviness (weight) is a unit of force. Force is a measure of mass times acceleration. Mass is the same for both still (frozen or unfrozen). So the weight is the same.

Answer 5

The liquid water at 4 degree Celcius is the heaviest even compared to ice. In your case, the water kept in fridge will certainly be at more than 4 degree and at temperature more than that of freezer water, therefore will weigh less.

Answer 6

Both weigh equally, that's Avogadro's hypothesis that states that equal number of same molecules weigh the same. That's the basis on which we call water and ice the same form of substance chemically.



Air trapped in the hexagonal structure in the ice is the cause of its density less than that of water.

Answer 7

they would weigh the same since they both have the same number of water molecules (as long as none evaporated from either!)

Answer 8

umm is this a trick question?



i would say neither because 400ml weighs the same at room temp, before you put in in the freezer

Answer 9

oxygen is trapped in the air bubbles in ice and held as extra weight

Answer 10

same