Gas specific gravity

Specific gravity (1666) (Sp gr) n. The ratio of the density of a hquid or sohd material to the density of water at 4°C, or other specified temperature. The notation is often used to specify the two temperatures, the subscript t2 being that of water. For gases, specific gravity is rationed on that of air at standard conditions, usually 101.325 kPa and 0°C. When buoyancy corrections are made to mass determinations of the densities, the term absolute specific gravity is used. Specific gravity is often misused as a Syn density but the error is not as serious as the parallel error with specific heat because, in the density unit still in most common use, g/cm, water s density is very close to 1.000 at room temperature. The ASTM test for specific gravity (and density) of plastics by displacement is D 792. In the SI, the term relative density is preferred. 

Q = flow rate, MCFD Tb = base temperature, °R Pb = base pressure, psia G = gas specific gravity (air = 1)... 

G = Gas specific gravity = mol. wt./29 Pi = Valve inlet pressure, psia AP = Pressure drop across valve, psi Q = Gas flow rate, SCFH Qs = Steam or vapor flow rate, Ib/hr T = Absolute temperature of gas at inlet, °R T5I1 = Degrees of superheat, °F... 

Physical and Chemical Properties - Physical State at 15 XIand 1 atm. Solid Molecular Weight 380.92 Boiling Point at 1 atm. Not pertinent (decomposes) Freezing Point 392, 200, 573 Critical Temperature Not pertinent Critical Pressure Not pertinent Specific Gravity 1.65 at 25 C (solid) Vapor (Gas) Specific Gravity Not pertinent Ratio of Specific Heats of Vapor (Gas) Not pertinent Latent Heat Vaporization Not pertinent Heat tf Combustion Not pertinent Heat ctfDecomposition Not pertinent. 

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