High critical pressure ratio

The maximum velocity of flow that can be attained is the speed of sound. It is reached for the critical pressure ratio Wi ji, and true as well if w < Wknt- The flow rate then only depends on the pressure inside the enclosure, pi, and not on the external pressure, p2. Equation (7.20) hence applies for discharge processes with velocities below the speed of sound and Eq. (7.23) for all other cases. The latter is usually required if gas under high pressure is discharged. 

Physical and Chemical Properties - Physical State at 15 X)and I atm. Liquid Molecular Weight 234 291 Boiling Point at I atm. Very high Freezing Point Not pertinent Critical Temperature Not pertinent Critical Pressure Not pertinent Specific Gravity 1.088 1.237 at 20°C (liquid) Vapor (Gas) Density Not pertinent Ratio of Specific Heats of Vapor (Gas) Not pertinent Latent Heat of Vaporization Data not available Heat cf Combustion Data not available Heat cf Decomposition Not pertinent. 

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