If V (due to P or T ), D then… If V (due to P or T ), D then… Density of Gases Equation: must be in K. ** As always, T’s A sample of gas has density 0.0021 g/cm3 at and –18oC 812 mm Hg. Find density at 113oC and 548 mm Hg. T1 = + 273 = 255 K T2 = 113oC + 273 = 386 K –18oC 812(386)(D2) = 255(0.0021)(548) D2 = 9.4 x 10–4 g/cm3
If V (due to P or T ), then… D If V (due to P or T ), then… D Density of Gases Equation: ** As always, T’s must be in K. A sample of gas has density 0.0021 g/cm3 at –18oC and 812 mm Hg. Find density at 113oC and 548 mm Hg. T1 = –18oC + 273 = 255 K T2 = 113oC + 273 = 386 K 812(386)(D2) = 255(0.0021)(548) D2 = 9.4 x 10–4 g/cm3
gas%20notes.docx