Environmental Engineering FOURTH EDITION

Appendix C

Physical Constants

UNIVERSAL CONSTANTS

Avogadro's Number = 6.02252 x

Gas constant R = 8.315 Hkg-mobK = 0.08315 bar-m3/kg-mole-K

Gravitational acceleration at sea level g = 9.806 m/s2 = 32.174 Ws2

Properties of water:

= 0.08205 L-atrdmols-K = 1.98 caVmoleK

Density = 1 .O kgL

Specific heat = 4.184kJkg-"C = 1OOOcavkg-"C = 1.OOkcavkg-"C

Heat of fusion = 80 kcaVkg = 334.4 Hkg

Heat of vaporization = 560 kcavkg = 2258 Hkg

Viscosity at 20°C = 0.01 poise = 0.001 kg/m-s

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