Arh. Goodwin et al., VAPOR-PRESSURE OF 2-(DIFLUOROMETHOXY)-1,1,1-TRIFLUOROETHANE CHF2-O-CH2CF3 (HFE-245), Journal of chemical and engineering data, 43(5), 1998, pp. 846-848
The vapor pressure of 2-(difluoromethoxy)-1,1,1-trifluoroethane, a can
didate alternative refrigerant that is also known as HFE-245, has been
measured. The vapor pressure was determined at temperatures between 2
61 K and 369 K by two ebulliometric techniques. The differences in the
se two methods arise from the method used to determine pressure. Atp <
200 kPa, a comparative instrument was used and pressures were obtaine
d from the temperature at which water boiled at the same pressure. At
pressures up to 747 kPa, the pressures were measured directly. A corre
lation for the vapor pressure from 261 K to the critical temperature i
s provided. The comparative ebulliometric measurements have an expande
d uncertainty (k = 2) of less than 0.0005.p, while the direct ebulliom
etric measurements have an expanded uncertainty (k = 2) of 0.002.p.