Physical relationships

Standard Temperature and Pressure (STP) = 760 Torr and 0°C. 1 gram mole = The amount of a substance whose mass in grams is equals the mass of one molecule in atomic mass units (approximately 6.022 x 10A23 molecules). Degrees Kelvin (absolute temperature) oK = oC + 273.16 Universal Gas Constant, R = 8.314 kJ/mol.°K

Gas equation: pressure x volume = R x absolute temperature [ PV = RT ] 1 gram mole (mol) of vapor occupies 22.4 liter at STP

Water: Boiling point (SAP) Density Surface tension Specific heat Latent heat Molecular mass

= 100oC

= 1 gm/ml at 16oC = 54.9 dyne/cm2 at 40oC = 1 cal/gm oC

Ethanol: Boiling point (SAP) Density Surface tension Specific heat Latent heat Molecular mass

= 0.791 gm/ml at 16oC = 21.38 dyne/cm2 at 40oC = 0.58 cal/gm.oC = 204 cal/gm = 39.33 kJ/mol = 46.068 atomic units

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