ELECTRICAL CONDUCTANCE OF LIQUID AND SUPERCRITICAL WATER EVALUATED FROM 0-DEGREES-C AND 0.1 MPA TO HIGH-TEMPERATURES AND PRESSURES - REDUCED-STATE RELATIONSHIPS

The electrical conductance of liquid and supercritical water to high temperatures and pressures is represented by an equation that incorporates some earlier observed trends and a newly discovered reduced-state relationship presented here. Calculations with the equation are believed to describe within plus or minus 1 to plus or minus 5% the specific conductance of liquid water at temperatures from 0 to 374 degree C and at pressures from saturated vapor pressure to 1000 MPa (10 kbar). For supercritical water at fluid densities from about 0. 3 to 1 g cm** minus **3 and at temperatures from 374 to 1000 degree C, the uncertainties probably will increase from 5% to perhaps 15% at the highest temperatures and pressures.