What if any effect does water temp have on a common water aspirator vacum pump for chemistry use.I live in a geothermally actve area and the well temp is in excess of 130
f.And tap water even in winter is often in excess of 115f
replied to: grndpndr
Replied to: What if any effect does water temp have on a common...
The strength of the vacuum you can achieve is limited by the vapor pressure of water at the operating temperature.
To a first approximation, the maximum vacuum you can achieve with a water aspirator running at 50 F is ~9 Torr while at 130F you only get a vacuum of 115 Torr [N.B. 760 Torr is atmospheric pressure, i.e. no vacuum; 0 Torr is a perfect vacuum]. Actual results might vary slightly, but the net effect is that you won't get as strong a vacuum using hot tap water. If your using the aspirator to vacuum boil water in a flask, you would need to heat the flask such that it is warmer than the well water passing through the aspirator.
