generating electricity

[Oldboy913]

is it possible to generate electricity from water at 75 degrees C

[beso]

Energy is not generated by a specific state but the difference between two states. You can generate electricity from water at 500 degrees if there isn't a colder place to send it and allow you extract the difference.

So long as there was somewhere colder to create a difference it is potentially possible.

[beso]

Typo:
You *can't* generate electricity from water at 500 degrees if there isn't a colder place to send it and allow you extract the difference.

[Azalian]

Yes, very easily. heat the water at the top of a hill, then pour it down a long steeply sloped pipe, with a turbine at the bottom end, voila, electricity!!

Actually, this works whatever the temperature of the water, lol

[Craftypig]

Like this?
http://sensorymetrics...icity-from-hot-water/

[jake-the-peg]

yes but not a lot unless you have a lot of it

Energy=MCdt

M is mass C is the specific heat capacity of water and dt is the change in temperature.

So if the diference in temperature is about 50 degrees and you've got a tonne of water at that temperature (C is 4200 Joules per Kg per degree)

Then there's a total amount of energy of about 4MJ of energy in that tonne.

That's enough energy to run a 1 bar electric fire for a little over a minute assuming you can get all that energy out at 100% efficiency and convert it to electricity

[jomifl]

So to summarise.. if you have something that can absorb or carry heat away ie. at a different temperature then yes you can The greater the temperature difference the greater the amount of elecrical energy that can be generated.