Contents Chapter 4: Quick Reference Guide to the Gas-phase Kinetics Subroutine Library | Print page 4.6. Gas Constants and UnitsTable 4.5: Gas Constant and Units Subroutines Subroutine Description SUBROUTINE CKRP (ICKWRK, RCKWRK, RU, RUC, PA) Returns universal gas constants and the pressure of one standard atmosphere. « 4.5. Information About Reactions 4.7. Equations of State and Mole-Mass Conversions »