[A@R WINDOWCLEANING]

has anyone had any trouble freezing using hot water in this weather?

[rg1]

Hot water will freeze quicker than cold water if it hits a cold surface

[the bfg]

No  not had any problems using hot

[Perfect Windows]

Hot water will freeze quicker than cold water if it hits a cold surface

Give us proof of that.  It's something that's repeated on here time and again with no basis in fact.

Yes, there are conditions under which hot freezes faster than cold (e.g. in a tall, narrow cylindrical container) but a thin film on a surface is not one of them.

Vin

[darren clarke]

http://www.xs4all.nl/~johanw/PhysFAQ/General/hot_water.html

[Perfect Windows]

http://www.xs4all.nl/~johanw/PhysFAQ/General/hot_water.html

OK.  Did you read what I said?  I've agreed that hot can sometimes freeze quicker than cold.  No disagreement from me at all.  It's there in the words I wrote earlier if you read them.

What I'm disagreeing with is the completely unfounded statement that it will freeze faster in the circumstances that we encounter, namely thin films on cold surfaces.

Vin

[CLEANCARE WC]

ITS A VERY NARROW WINDOW (EXCUSE THE PUN) WHERE THAT PHENOMENON OCCURRS ANYWAY.

[tom2009]

surely the hot water has to go through the same temperature as the cold on the way to freezing 

[Perfect Windows]

surely the hot water has to go through the same temperature as the cold on the way to freezing 

It would appear so, but the key is to get the conditions such that the temperature of the hot water is falling quicker than the cold water.  Then even though they both pass through the same temperature, the hot gets to freezing point quicker.  You can do it under specific circumstances.  The link above gives some theoretical background.

Vin

[G Griffin]

Hot water will freeze quicker than cold water if it hits a cold surface

There are many variables to consider with this theory.  

[tom2009]

surely the hot water has to go through the same temperature as the cold on the way to freezing 

It would appear so, but the key is to get the conditions such that the temperature of the hot water is falling quicker than the cold water.  Then even though they both pass through the same temperature, the hot gets to freezing point quicker.  You can do it under specific circumstances.  The link above gives some theoretical background.

Vin

I stopped reading when I got to dissolved gasses Vin, all started to addle my brain. 

[dd]

Post been diverted into useless direction by someone who I am guessing does not use hot water. I am more interested in the original question rather than a laboratory controlled experiment, bearing little relation to our working conditions.