Specific Gravity

화학공학/화공일반 2016. 4. 6. 15:16

Specific gravity

Common symbols
 SG
SI unit Unitless
Derivations from
other quantities
 SG_\text{true} = \frac {\rho_\text{sample}}{\rho_{\rm H_2O}}

 

 

The reference substance is nearly always water at its densest (4°C) for liquids; for gases it is air at room temperature (21°C).

 

Nonetheless, the temperature and pressure must be specified for both the sample and the reference. Pressure is nearly always 1 atm (101.325 kPa).

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