對(duì)于實(shí)際氣體,R與壓力、溫度、氣體種類(lèi)有關(guān)。當(dāng)溫度較高、壓力較低時(shí),R近于常數(shù)。當(dāng)T 較高,p→0時(shí),無(wú)論何種氣體,均有:
R =(pVm)p→0/T=8.314472J·mol-1·K-1
R=8.314472cm3·MPa·mol-1·K-1
R=8.314472*103dm3·Pa·mol-1·K-1
R=8.314472m3·Pa·mol-1·K-1
R=0.0820574587L·atm·mol-1·K-1(atm:一個(gè)標(biāo)準(zhǔn)大氣壓)
R =(pVm)p→0/T=8.314472J·mol-1·K-1
R=8.314472cm3·MPa·mol-1·K-1
R=8.314472*103dm3·Pa·mol-1·K-1
R=8.314472m3·Pa·mol-1·K-1
R=0.0820574587L·atm·mol-1·K-1(atm:一個(gè)標(biāo)準(zhǔn)大氣壓)