which is the better coolant? the liquid with the higher or lower specific heat capaticity? and y?
84471
Higher specific heat capacity liquids can absorb more heat energy per unit of liquid than lower specific heat liquids.\n\nIn most applications the higher specific heat liquid will be the liquid of choice as it can "carry away" more heat per unit volume.
43501
Its a Metal, hence responds to / is a conductor of heat.\n\nIts fluid so the expansion per gradient of heat would be highest.\n\n\nAll other liquids are not a conductor of heat ( or as good as mercury)
419356
I will take a stab at it.  I am guessing it is because water has more degrees of freedom.  In the liquid there is also rotational degrees of freedom to absorb energy that the solid ice does not have.\n\nTo Neil, the formulas are for heat capacity and have nothing to do with the way something is heated, only the amount of energy that it takes.\n\nNor does it have anything to do with Newton's law of cooling.
1174986
100C:::: Pure water boils at exactly this temperature.\n37C:::::: Normal Human body temperature\n0C:::::::: Pure water freezes/melts at exactly this temperature
361464
the principle is by compressing a coolant, and injecting this coolant into a small pipe, the size will minimize heat built up, as the coolant moves around the pipe or coil, air is blow into this coil which result into cooler air.\n\nThe coolant is then compress back to repeat the process.
849685
Water has a very high " specific heat ".  Specific heat is a measurement of how much energy is needed to raise the temperature of a substance. \nHere is a table of a few specific heats:\nhttp://hyperphysics.phy-astr.gsu.edu/hbase/tables/sphtt.html\n\nIf you notice, water is much higher than anything else on that list.\nFor comparison, it would take you 5 times more energy to increase the temperature of water by 1 degree than it would take to increase the temperature of solid granite by 1 degree.  \n\nWater has some very strange properties, but because it is so common, we think nothing of it!
1185880
Do you mean specific (related to mass), molar or volume output?\n\nSpecific output is higher for Ethanol because it contains less oxygen in the educt.\n\nMolar output is higher for Ethanol (less oxygen, greater amount of burnable atoms per molecule).\n\nVolume output I can't do off my head, but given the greater specific output for Ethanol and assuming a greater density for it, Methanol loses again.\n\nMethanol will produce less CO2 per mol, mass or volume when burnt than ethanol, but most probably more CO2 per joule.
178613
Water freezes faster.  All sodas contain acid which lower a liquid's freezing point.  The lower the freezing point, the longer it takes something to freeze.
599695
Aluminum is 2.9 times as dense as iron. On the other hand, iron has roughly half the specific heat as aluminum.\n\nSpecific heat is measured in terms of how many calories of energy it takes to raise the temperature of one gram one degree centigrade. \n\nGiven two equal masses of aluminum and iron, the aluminum with the higher specific heat will take more energy to heat and give of more energy cooling. As a result, it will take longer to heat and cool. \n\nHowever, given two equal volumes of aluminum and iron, the aluminum will have only 1/3 the mass and therefore will need throw off only 2/3s as much heat to cool as the iron.
402010
ok, first of all, get a heatpipe system.  decent cooling and less hassle than liquid. the evercool model is like 30 bucks.  also dont use cheap thermal paste. spend the money for arctic silver. you can get arctic V offa ebay for like 2 bucks, at frys its around 12. also arctic clean is good to take off the old crappy compound. cheap thermal compound SUCKS.
973545
It is now clear who is asking for the limit of 3 degrees. Is it the turbine manufacturer, surface condenser manufacturer, or someone else?\n\nI assume the condensate is being pumped. Is it the condensate manufacturer that is asking for the limit?\n\nI would think from a heat conservation standpoint, you would want to keep it as close to the condensing temperature as possible and still be able to pump the condensate.
341576
Besides the loss of heat due to the difference with room temperature, we can also check how water specific heat behaves with temperature. \nThe specific heat is the amount of heat required to change a unit mass of a substance by one degree in temperature. This specific heat increases with temperature, so this indicates us that water at a higher temperature needs a bit more energy to rise 1º than water at lower temperature.\n\nSo the answer is yes, it will take more time to rise from 90º to 100º because of two reasons:\n1- There is more loss of heat in the water at 90º than water at 10º.\n2- Specific heat is higher in water at 90º than water at 10º.
554328
Munir is right.  H2 will behave most like an ideal gas in a condition with Highest temperature and lowest pressure, making your Choice 3.
238559
You are talking about specific heat. According to the chart at the link below, it's a tie between Radon and Radium. They have the lowest specific heat.\n\nSpecific heat is defined to be the amount of energy required to raise the temperature of one kilogram of the substance by one kelvin. You are asking about the elements with the lowest specific heat. Gold and lead also have very low specific heats.
959876
a) the hydration energy is greater because the temp decreases. When you go from a low potential energy substance to a high potential energy substance the temp of solution will decrease.\n\nb) the solubilty will increase because energy is on the reactant side of the equation. (the reaction is endothermic and requires energy to occur)
587903
Steam isn't "hotter", it's still at 100°.  What it has though is more heat energy in it kg for kg.  The extra energy is the heat of vaporization and it's the reason the steam takes up so much more volume than the water at the same temperature.  The water molecules have the same average kenetic energy - temperature - but they occupy much less space.
267213
The coolant cycles through a small radiator, (your heater core).  Get this fixed quick, especially if you smell a funny maple syrup smell in the cabin.  It will smell stronger when the heat is on.  Ethylene glycol (coolant) was used in agent orange and is highly toxic.