In a message dated 2/4/01 4:23:22 PM Pacific Standard Time,
brucea@xxxxxxxxxxx writes:
> The contents of my Dust-off can include difluorethane. This is a
> refrigerant also known at HFC-152a.
>
> As with all refrigerants, as the liquid in the can expands to a vapor as
you
> spray it, it absorbs heat from the surroundings (the latent heat of
> vaporization). That's why the can gets real cold!
>
> Tune in again another time for more from Dr. Science ......
>
> PS for those who are just dying to know, HFC stands for hydrofluorocarbon.
> These materials don't deplete the ozone layer but may contribute to global
> warming
>
You're absolutely right, Bruce. I didn't see that 'til now. Another good
reason to stick with the simple little bulb-type dusters, not to mention the
disposal problem the empty can creates, or the hole in the wallet.
Rich
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