The pressure-volume-temperature (PVT) behavior of difluoromethane (R32
) has been measured using a vibrating tube densimeter apparatus and a
Burnett/isochoric apparatus. Liquid PVT data from the vibrating tube d
ensimeter ranged in temperature from 242 to 348 K with a pressure rang
e of 2000-6500 kPa. Data from the Burnett apparatus consisted of 11 is
ochores for the gas and supercritical fluid, along with vapor pressure
measurements. The temperature ranged from 268 to 373 K. The gas-phase
data are correlated with a virial equation of state. The compressed l
iquid data are fit with an abbreviated form of the modified Benedict-W
ebb-Rubin (mBWR) equation. A table of thermodynamic properties is pres
ented for the saturated liquid and vapor states.