2006-09-18 17:57:53 · 9 answers · asked by Bill Billington 1 in Science & Mathematics ➔ Physics
the temperature DOES change - it becomes water and melts away.
2006-09-18 18:00:33 · answer #1 · answered by the Engineer 2 · 0⤊ 2⤋
It has to do with Gibson's phase rule. Check: (http://en.wikipedia.org/wiki/Phase_rule). It comes from thermodynamic principles that the number of degrees of fredom (F) on a closed system at equilibrium is F=C-P+2, where C the number of chemical components (you have only water=1), and P is the number of phases (liquid and solid = 2), so you have F=1-2+2=1. So defining ONE variable anchors your system to a state. You are doing your experiment at the atmospheric pressure so P is fixed and T at that pressure is uniquely defined.
Notice that you can have ice at many temperatures (-273 to 0 C), and water at many temperatures(0-100C), but when you put them together in very good contact (the equilibrium condition) they can only exist at one temperature for a given pressure. If doing your experiment at 1 atm, then the temperature is ~0C. Any enegy spend on the system will go into melting the ice, not chaging the temperature because the system don't have thermodynamic freedom. Once all the ice is melted, you have only one phase (liquid) and P and T become independent (2 degrees of freedom on the system).
2006-09-18 18:52:10 · answer #2 · answered by ch 1 · 1⤊ 0⤋
The melting process is endothermic meaning it requires energy to proceed. Therefore the energy being added to the ice is absorbed by the endothermic melting phase change and does not result in a raised temperature. The same thing occurs when water vaporizes.
2006-09-18 18:07:17 · answer #3 · answered by jfmiller81 1 · 1⤊ 0⤋
I just read 5 answers that were hard for me to understand so I'll try different terms....heat is the measure of quantity, temperature the measure of degree or intensity. Temp is measured in degrees with a thermometer. Heat is measured in BTU (British Thermal Units). Now at 32 degrees with 16 BTU you have ice...adding 144 BTUs and you still have 32 degrees but you now have water and no ice.So between the 16 BTUs and the added 144 BTUs you have ice forming or melting but you still are at 32 degrees..You can find info on this in air conditioning or refrigeration info...hope it helps
2006-09-18 18:34:20 · answer #4 · answered by well-owl-bee 1 · 0⤊ 0⤋
It's the heat of fusion. You probably know what the heat of fusion is for ice-to-water, from your textbook. As ice melts, all the energy being imparted goes to heat of fusion, and none is available to raise the temperature of the water. When all the ice is melted, the imparted energy will raise the temperature.
2006-09-18 18:10:43 · answer #5 · answered by ? 6 · 0⤊ 0⤋
the temperature of melting ice is a barrier. you will need specific amount of energy to offer to the system in order to make ti melt. as soon as all the ice melts then the temperature of the water will start to rise accordingly.
2006-09-18 18:51:57 · answer #6 · answered by Emmanuel P 3 · 0⤊ 0⤋
when ice is melting, it's also taking energy to break the weak Van der Waal's force between the molecules. Hence temperature remains constant during melting, at 0 degree Celsius.
2006-09-18 18:05:01 · answer #7 · answered by nick p 1 · 1⤊ 0⤋
It's called latent heat.
2006-09-19 05:04:13 · answer #8 · answered by dwarf 3 · 0⤊ 1⤋
it doesn't?? hmmm.. i always thought it melts because of the changing temperature. seriously, i don't know the answer to your question. sorry.
2006-09-18 18:10:27 · answer #9 · answered by FinancialPanes 3 · 0⤊ 3⤋