If you put solid ice in a cup, and it melted over time, would the liquid weigh the same as the ice?
339248
Due to sublimation, it will weigh slightly less. However, in a closed system (say you sealed the cup in an airtight box and weighed that before and after the ice melted) there would be 0 change in mass due to conservation of mass/energy.
247971
From what I was TOLD,\nGlass doesn't have an observable melting point. If you've seen a graph of temperature of a substance plotted against the time it is heated constantly, you'd know what 'observable' means. A substance (e.g. water) may STAY at two temperatures (0C & 100C for water) for some time even though it never stops being heated. For water the lower temperature is when ice melts and the higher when water boils, and they are called melting/boiling points respectively.\n\nDuring the time 'solid' glass is heated till it is clearly liquid, no such temperature-halt is observed, so they say glass has no observable melting point.\n\n[edit] I too prefer the way calling glass a liquid. Since it's already concisely mentioned, I added quotation marks around the word 'solid', intending to express glass appears to be solid but it may well be an extremely thick liquid.
730140
The ice would gain 124.3 kJ in moving from -10 °C to zero.\nThe water would lose 252.0 kJ in moving from +10°C to zero.The difference in the two energies is sufficient to melt 383 g of ice.\nSo the mixture will be at 0 °C and will consist of 6383 g of water and 5617 g of ice.
931428
The speed at which it melts it dependent on the amount of heat that is transferred to the ice. The speed at which heat is transferred is dependent on the environment. \n\ne.g. ice will melt a lot faster when it is placed in water of 20 degrees Celcius, than when it is placed in air of 20 degrees Celcius.
628194
It decreases ever so slightly.\n\nFrozen water has a larger volume than liquid water (this can be inferred from the fact that it is less dense; alternatively you can show it is less dense if you know it has a bigger volume), so as more water goes from solid (ice) -> liquid (water), the total volume decreases.\n\npeople have been saying it increases; this is incorrect! When you put water in a cup and leave it in the freezer, the cup breaks. This is because water EXPANDS as it turns into ice; therefore it will CONTRACT when it melts.
16969
It's a solid, so it's already frozen. Heat it up enough, and it will melt.
1175149
A solid, unlike a liquid or a gas, does not take the shape of its container.\nPour some water into a glass and the water takes on the shape of the glass, pour this water onto the floor and now the water has an entirely different shape.  The same goes for gasses.  However, put some solid object in a glass, on the floor, ..., and it still has the same shape.\n\nBoth solids and liquids have definite volumes, unlike gasses.  Solids and liquids are considered "incompressible".  No matter how much you squeeze them, they retain their volume.  Gasses however can be compressed/expanded depending on the force acting on them.
379947
MY GOD!  Don't answer if you don't have a clue.\nA) False - water is exactly 1g/cm3\nB) False - ice floats, thus less dense\nC) False - Water is made of two elements (Hydrogen and Oxygen), thus it cannot be an element itself.\nD) True - The mass of water does not change when it is frozen, melted or heated into steam.  It is still H2O.  No atoms were split or made!\nE) False
671597
From personal observation I would say not always.  When ice is frozen for a long time it seems to lose its freshness.  It picks up odors and when defrosted doesn't smell or taste like fresh water. These things would indicate physical changes probably due to evaporation and perhaps osmosis.  Both of these occurrences would produce a change in quantity.
1119466
I donno ;=)\n\nMay be start with a heat balance equation like\n\nQfinal=Qwater-start  - Qice-start – Qlatent\n\nIn other words the final heat of the system is equal to the original amount of heat minus the heat required to bring ice to the melting point and minus again the amount of heat needed to melt the ice\n\nOr \nQfinal=(Specific-heat of water) (temp in K)(mass-final)\n\nmass-final= mass of water + mass of ice= m1 + m2\n\nNote -273.16 °C =0 degrees on Celsius scale = 273.16 °K (273 I hope is good enough for you?)\n\nQwater-start  =( 4190 J/(kg*K) (t-start K degrees )(m1)( 4190 J/(kg*K)=A(m1)  A= 4190 (76.2 + 273)\n\nQice-start= 2100 J/(kg*K)( - 23.6+273)(m2)= B(m2)\n\n\nQlatent= 334 kJ/kg(m2) =C(m2)\n\nWe have \n\nD(m1+m2)=A(m1)+B(m2)+C(m2)  you know that m1=.280kg  then you figure out m2? \nAnd \nA= 4190 (76.2 + 273)\nB=2100 (- 23.6+273)\nC=334,000\n\nActually Specific heat of ice = 2060 J/(kg*K) not 2100 J/(kg*K)\nAnd Specific heat of water  =4,183  J/(kg*K)
383803
hey! the force acting on these spheres is the buoyant force.  buoyant force is equal to the weight of the liquid displaced by the immersed object.As in this case the weight of both spheres is the same [m*g i.e(1kg*9.8m/s2)] the buoyant force will also be the same.hence none of them "appears to lose" and both appear same.get that??!
239892
Melting speed is proportional to surface area (more or less).  If we assume a cubical block of ice then the surface area is 6x^2, where x is the length of a side.  However the material melts away volumetrically, which is x^3.  So the rate at which the cube melts is proportional to the ratio of surface to volume, or 6/x.\n\nSo suppose we have a cube with side of length 10.  The surface area is therefore 600, and the volume 1000, and the ratio 3/5.  Later on after it's melted a bit the length of a side will be 5, the SA 150, the volume 125, and the ratio 6/5.  \n\nThus the "melting rate" increases as the cube gets smaller so the decrease is geometric, not linear.\n\nGood question  :)
827729
it all depends on what Temperature is acting upon.  If your talking about a solid, no, not really, if it does, it is negligible.  However, Temp. does affect the density of liquids, most liquids become more dense as temp. get colder, and less dense if the temp gets higher.  If you are talking about gasses, then the temp will affect both volume and density. think of a balloon. If you put a balloon outside in the winter, it will become smaller.  This is because the density of the air inside goes up and the volume goes down.... \nThe formula to determine what happens with a gas is PV=nRT, whereby P=the atmospheric pressure, V=volume, n= the #of moles of a gas R=is the ideal gas constant and T=temp... hope that helps.
579210
Ice freezes and melts at 0 deg Celcius, ice water at about -18 degrees.\n\nWhen ice melts, it goes from ice at 0 deg to water at 0 deg. In the process, absorbs 80 calories of heat per gram of ice. This is known as heat of fusion.\n\nIf you have ice in water, all at 0 deg, there is an equilibrium formed where some of the ice is melting absorbing heat of fusion from the water, and some of the water is freezing giving heat back to the ice. \n\nWhen you add salt to the mixture, the freezing point of the water is depressed below 0, so the heat absorbed from water causes it to cool below 0 rather than being refrozen into ice.
1142972
In short, ice float in water because it is less dense.\n\nDensity = mass / volume\n\nFor a more thorough explanation, one needs to look at what happens when liquid water freezes into solid water (ice).\nAs the water freezes and becomes a solid, it expands.  The volume of a given mass of water becomes larger, therefore the density decreases.  Without going into the effects of buoyancy to explain "why" less dense things float (the weight of the fluid they displace is greater than the weight of the object), just accept that they do.\n\nTo be even more thorough,\nWater expands when it freezes because of the strong, "Hydrogen bonding", intermolecular forces which exist between the water molecules in the liquid/solid.\nWhen water is a liquid, the molecules have much more freedom to move around and rotate any way they please, but when the water freezes into a solid, the molecules have significantly less energy (thus less freedom to move around) and try to take on the most stable/low energy state they can...which happens to be in a lattice structure which has a higher volume that when the molecules were in the liquid state.  So it is because of the Hydrogen bonding present between the water molecules that solid ice float in liquid water.
584455
When the whole ice will melt, water will not come out of the cup, the reason being this. the density of water is maximum at 4 oC and ice which is at 0 oC is less dense than that of water. so, according to the relation: density= mass/volume or inversly you can say volume=mass/density, the volume occupied by ice is more (being less dense, inversely proportional to density), and that occupied by water (which will be formed after ice will melt) is less (being more dense than ice). so water formed from ice will be occupying less space than ice and the water will not come out.
136745
Good question!  You obviously know that glacial ice is not the same as frozen water in an ice cube tray in your freezer!  (glacial ice is compressed snow)  My initial response was that icebergs float, so yeah, it would float.  Then I thought that seawater is salty, which can cause more dense things to float and doesnt nescessarily provide a good proxy for a cup of drinking water.  Thennnnnn (you like following my train of thought here?) I remembered that icebergs calve into fresh water lakes, too and float.  So my long-winded non-quantitative answer is yes.  :)\n\nI have no idea if there is a difference in rate of melting, but my best guess is that it might take SLIGHTLY longer to melt.