PVT data may be taken by the following procedure. A mass m of a substance of molar mass M is introduced into a thermostated vessel of known total volume V. The system is allowed to equilibrate, and the temperature 7 and pressure P are measured. Approximately what percentage errors are allowable in the measured variables (m. M. V',T and P) if the maximum allowable error in the calculated compressibility factor Z is ±1%?
