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  4. Which weighs more, a litre of ice or a litre of water?
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Which weighs more, a litre of ice or a litre of water?

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Offline The Scientist (OP)

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Which weighs more, a litre of ice or a litre of water?
« on: 03/07/2010 10:02:26 »
Please provide explanations. Thanks!
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Offline Carbonizer

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Which weighs more, a litre of ice or a litre of water?
« Reply #1 on: 03/07/2010 15:14:10 »
The litre of water weighs more, and this is why ice floats in water. When water freezes, it expands and becomes becomes less dense. While it is true that most things are more dense in their solid state, it is not true of water.
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Offline JaneMiller

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Re: Which weighs more, a litre of ice or a litre of water?
« Reply #2 on: 02/05/2018 04:09:14 »
I agree with Carbonizer. Water is heavier
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Offline Bill S

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Re: Which weighs more, a litre of ice or a litre of water?
« Reply #3 on: 03/05/2018 00:06:20 »
Would this distinction hold in zero gravity?
I would think not, but I've been wrong before. :)
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Online chiralSPO

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Re: Which weighs more, a litre of ice or a litre of water?
« Reply #4 on: 03/05/2018 00:09:55 »
Quote from: Bill S on 03/05/2018 00:06:20
Would this distinction hold in zero gravity?
I would think not, but I've been wrong before. :)

I think you are correct.

1 L of water is more massive than 1 L of ice. This will translate into greater weight if any force is applied to the samples.
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Offline wolfekeeper

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Re: Which weighs more, a litre of ice or a litre of water?
« Reply #5 on: 03/05/2018 01:14:06 »
It depends. A litre of ice can have a density of 1.65 times that of normal water, so I'm going with ice, unless it's specified to be at normal pressure, in which case it's water that is denser:

https://en.wikipedia.org/wiki/Ice_VII
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Online evan_au

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Re: Which weighs more, a litre of ice or a litre of water?
« Reply #6 on: 03/05/2018 09:37:34 »
This chart suggests that even at -200C, ice is less dense than liquid water at 100C.
I assume that this is taken at standard pressure, so that no exotic phases of ice were present.
https://en.wikipedia.org/wiki/File:Density_of_ice_and_water_(en).svg
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Offline PmbPhy

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Re: Which weighs more, a litre of ice or a litre of water?
« Reply #7 on: 03/05/2018 11:28:29 »
Quote from: Bill S on 03/05/2018 00:06:20
Would this distinction hold in zero gravity?
I would think not, but I've been wrong before. :)
Water would still be more dense so if you had a comnination of water and ice in a centrifuge aboard the ISS the ice would still float to the surface of the water. But since nothing weighs anything in a weightless environment they its meaningless as you said.
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Offline LaurenaS

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Re: Which weighs more, a litre of ice or a litre of water?
« Reply #8 on: 19/01/2021 15:38:06 »
I guess the answer to this question is slightly open. Water is actually denser than ice at one liter. So I would say water. And if the same one liter of water gets frozen it even gain more on its volum
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Offline Halc

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Re: Which weighs more, a litre of ice or a litre of water?
« Reply #9 on: 19/01/2021 17:47:30 »
Quote from: LaurenaS on 19/01/2021 15:38:06
I guess the answer to this question is slightly open.
The question was answered 10 years ago by the first reply. Any reason you are finding the need to dredge up all these old threads asked by people no longer active on the site?

Quote
Water is actually denser than ice at one liter.
This comment makes it sound like ice might be more dense than water at a different volume.
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