Except for gems and precious metals, 5 lbs of anything weighs
exactly the same as 5 lbs of anything else. Namely, 5 lbs.
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They weigh the same
In a sealed chamber with no loss of mass, five pounds of water plus sufficient heat will produce five pounds of steam. The mass of the water remains the same, regardless of its state. Freeze it, and you'd have five pounds of ice instead.
10 pounds of water (molten ice) = 1 imperial gallon. (at standard atmospheric pressure and temperature).
The volume of the block (slab ?) is (24-ft x 24-ft x 1/3-ft) = 192 cubic feet.We know that ice is slightly lighter than water ... that's why ice floats in water ...so we have to look up the density of ice before we can say what the slab weighs.In a quick search on-line, we found one source that gave the density of ice as 0.931,and another that said it's 0.917. (both relative to water) ... a difference of about 1.5% .So we know immediately that our answer is going to be only approximate, when we'redone spending as much effort on it as we care to.First ... the weight of the same volume of water, at 39° F (most dense) =11,983.9 pounds = 6 tons.Weight of the same volume of ice (using average of the two density figuresthat we found on-line) =11,071.3 pounds = 5.536 tons (rounded)
-- Ice melts. -- Water freezes. -- Ice and water can coexist at the same temperature in the same container.