Getting water to zero degrees celsius

[anonymous-user]

Does your cooking warrant that degree(sic) of temperature accuracy? Mine certainly doesn't......... ;-)

[Barbarossa]

The Nur said:

Put salt in it?

eta: I may have demonstrated how retarded I am with this post.

I think that salt lowers the freezing point of water to below 0C.

[The Nur]

Barbarossa said:

I think that salt lowers the freezing point of water to below 0C.

Yeah, it wasn't the most well thought out post I have ever made

[AER]

cmsapms said:

Thanks very much chaps. I'll crush some ice tonight.

I'm also going to test it at 100 degsC so any inaccuracy will show as either an absolute offset or a percentage - between 0 and 100, anyway. I shall just wing it outside that range

You're assuming sensor linearity there. A two-point calibration is only as good as the linearity of the device.

Anyway, here's all the data you need to make water your calibration medium!

[caziques]

Not forgetting water only boils at 100c at sea level.

[Trax]

Remember doing this in Physics at school.

Was told melting ice water will be as close as dam it to 0 degrees. You will have to put a little amount of water in the ice, to get it going.

[Skyrat]

Barbarossa said:

I think that salt lowers the freezing point of water to below 0C.

Yup, in fact brine freezes at zero degrees Fahrenheit as that is what he based the scale on, for some strange reason.

[cmsapms]

Skyrat said:

Yup, in fact brine freezes at zero degrees Fahrenheit as that is what he based the scale on, for some strange reason.

Is brine a definitive substance; ie pure water with "X" amount of salt in it? Or does water with anything from a smidge to a full saturation of salt count as brine and freeze at zero fahrenheit?

[RealSquirrels]

cmsapms said:

Skyrat said:

Yup, in fact brine freezes at zero degrees Fahrenheit as that is what he based the scale on, for some strange reason.

Is brine a definitive substance; ie pure water with "X" amount of salt in it? Or does water with anything from a smidge to a full saturation of salt count as brine and freeze at zero fahrenheit?

i don't know but i would suggest it's a saturated solution of salt (i.e. as much salt in the water as will dissolve)

[Halmyre]

RealSquirrels said:

cmsapms said:

Skyrat said:

Yup, in fact brine freezes at zero degrees Fahrenheit as that is what he based the scale on, for some strange reason.

Is brine a definitive substance; ie pure water with "X" amount of salt in it? Or does water with anything from a smidge to a full saturation of salt count as brine and freeze at zero fahrenheit?

i don't know but i would suggest it's a saturated solution of salt (i.e. as much salt in the water as will dissolve)

That's what I thought too, but apparently it covers a wide range of salt-to-water ratios.