why dry ice does not produce electricity?
141738
Why on Earth would it?\n\nElectricity is the movement of charged particles.  Why would dry ice cause this to happen by itself?
7352
Because ice builds up on the power lines and breaks them, causing a loss of power to the people serviced by that line. Or tree branches/whole trees fall on a power line due to the weight of the ice, or a car slides on the road into a hydro pole.. Anyways, reasons like that.
695687
Please see the following dry ice website.\n\nPS - I am a licensed Professional Engineer.  I reviewed the following website and found the information quite adequate.  If you need additional information you just may need to do some work.
536595
Salt doesn't melt ice, it reduces the temperature needed to melt it. In Antarctica the temperature is so low, that even all salt water around doesn't help melting it.
293485
A Dry contact is one which air surrounds the contact surface.\n\nHigh powered devices use oil as an insulator. The contacts are submerged in oil to prevent an arc.\n\nYour main circuit breaker box in a home has dry contacts which are within the circuit breaker itself.\nThese operate, to complete the circuit, when the breaker is in the ON or closed state.\n\nOther examples would be relay contacts, used in home appliances such as the fridge, dishwasher or in automobiles etc.\n\nOil encapsulated contacts are usually found in industry, large rotating machines, high power distribution centers etc.\n\nSometimes a dry contact fails due to the air around the contact is ionized. This will cause the circuit to jump the barrier or space between the contacts when in the open state. This can generate high energy which causes tremendus amount of heat. Oftened the components are damaged when this occurs.
912180
it doesnt.  it conducts electricity.
625534
Everything goes from solid to whatever else one molecule at a time. It's just that under certain conditions, there is a spread between the energy that it takes to get away from the solid and the energy that it takes to exist as a gas. So, when you melt ice under one set of conditions, the molecules only have enough energy to break free from the ice crystals and go into solution. But, if the pressure is very low (outer space say) then that same amount of energy is enough to drive the water molecules into the gaseous phase instead.
716723
ice never melts when it is in an environment of 0C.  any environment above that temperature will eventally raise the temperature of the ice to its melting point...\n\nit is an inherent property of ice to melt at temperatures above 0C.\n\ndry ice is not ice.\nsteel is not ice.\nice is solid water which is only found at or below 0C (at atmospheric pressure).\n\nthis has to do with the gibbs free energy of the transformation \nH2O (solid) ----> H2O (liquid)
593519
dry ice is actually solid carbon di-oxide. solid hydrogen is called hydrate, and if you could make is solid at atmospheric pressure it would be very cold.
1115534
Liquid Nitrogen IS dry Ice. Just add water and you get smoke! Whatever you do, don't put it in the toilet, it will be cute at first, but it could break the bowl. And NEVER ever NEVER put dry ice in a closed container. Just don't do it. It is not neat or cool and it is very expensive, painful and scary.
1102710
Probably you would not notice much of a difference. In fact if you used electric heat you wouln't notice any difference at all (at least in the winter). The reason is the amount of electricity an appliance uses is pretty much proportional to the amount of heat it generates. If you really want to save electricity get rid of your oven, refrigerator, toaster, hair dryer, basically any appliance which generates a lot of heat.
1144517
Technically, Dry Ice "Sublimes" into a gas.  Melting would imply it turns into a liquid.\n\nIn order to make dry ice, Carbon Dioxide (CO2) is cooled under pressure until it reaches the solid state.\n\nIt is possible for Carbon Dioxide to be a liquid, although, not under normal atmospheric condictions.\nLooking at the phase diagram of CO2,\nhttp://scifun.chem.wisc.edu/chemweek/CO2/CO2_phase_diagram.gif\nYou must put CO2 under quite a bit of pressure before it will liquify at any reasonable temperature.\nAlso from the phase diagram, you can see that at room pressure (~1 atm, 25 degrees C), you can see why dry ice goes directly into the gas state as its temperature increases.
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.
781761
The answer is either 0% or 100%. If ice is 0 degrees C it will remain as ice. [in theory]
474500
Dry ice is frozen carbon dioxide.  The temperature at the surface (where it is sublimating back into gas) is -79 degrees Celsius (about -109 degrees Fahrenheit).\n\nSo yeah, it's really really cold, and if you touch it for too long the tissue damage it creates feels almost exactly like a burn.
817860
Dry ice isn't really ice at all; it is solid carbon dioxide.   It is -78C and the smokey vapour isn't CO2, it is water vapour that has been cooled by the dry ice.  Dry ice doesn't really melt either, it sublimes from solid to gas.
889370
carbon has no free electrons available\nso it cannot conduct electricitys\nin case of germanium and si they have d orbits in the outer shell and they have greater mobility