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Gazovaya postoyannaya
4.03.2002 20:32 | "Fizicheskaya Enciklopediya"/Phys.Web.Ru

Gazovaya postoyannaya universal'naya (molyarnaya) (R) fundamental'naya fizicheskaya konstanta, vhodyashaya v uravnenie sostoyaniya 1 molya ideal'nogo gaza: $pv=RT$ (sm. Klapeirona uravnenie), gde r - davlenie, v - ob'em molya, T - absolyutnaya temperatura. Gazovaya postoyannaya chislenno ravna rabote rasshireniya 1 molya ideal'nogo gaza pod postoyannym davleniem pri nagrevanii na 1 K. S drugoi storony, Gazovaya postoyannaya - raznost' molyarnyh teploemkostei pri postoyannom davlenii i postoyannom ob'eme: $s_p - c_v = R$ (dlya gazov, blizkih po svoim svoistvam k ideal'nomu). Chislennoe znachenie gazovoi postoyannoi v edinicah SI (na 1984 god): R = 8,31441(26) Dzh/( $mol'$\cdot$K$ ). V dr. edinicah: $R = 8,314\cdot 10^7$ erg/( $mol'$\cdot$K$ ) = 1,9872kal/( $mol'$\cdot$K$ ) = 82,057 sm^3 .atm/(mol'^.K). Fizicheskuyu postoyannuyu $B = R/\mu$ (gde $\mu$ - molekulyarnaya massa gaza) nazyvayut udel'noi gazovoi postoyannoi.

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