Tsab xov xwm hais txog Txoj Cai Zeroth ntawm Thermodynamics
Txog tam sim no, peb tsuas yog pom qhov sib npaug ntawm thermal uas ob yam khoom sib chwv.
Yuav kom nkag siab txog lub tswv yim ntawm kev sib npaug ntawm thermal kom tob dua, cia peb rov los saib peb yam khoom (piv txwv li cov khoom A, khoom B, thiab cov khoom C). Piv txwv li, khoom B thiab khoom C tsis sib chwv, tab sis khoom A sib chwv nrog khoom B thiab khoom A sib chwv nrog khoom C. Saib daim duab hauv qab no. Vim tias nyob rau hauv kev sib cuag nrog txhua yam tsis suav nrog khoom A thiab khoom B yog nyob rau hauv thermal equilibrium, yog li ntawd khoom A thiab khoom C kuj nyob rau hauv thermal equilibrium. Cov khoom B thiab C uas tsis sib chwv puas nyob rau hauv thermal equilibrium? Yog tias peb tsuas yog siv logic, peb tuaj yeem hais tias khoom B thiab khoom C kuj nyob rau hauv thermal equilibrium, txawm tias lawv tsis sib chwv. Khoom A thiab khoom B nyob rau hauv thermal equilibrium, txhais tau tias qhov kub ntawm khoom A = qhov kub ntawm khoom B.
Cov khoom A thiab khoom C kuj nyob hauv qhov sib npaug ntawm thermal, qhov kub ntawm cov khoom A = qhov kub ntawm cov khoom C. Vim yog TA = T uaB thiab TA = T uaC, ces TB = T uaCVim tias physics tsis yog tsuas yog vam khom logic xwb, nws yuav tsum tau ua pov thawj los ntawm kev sim. Raws li cov txiaj ntsig ntawm kev sim, nws hloov tawm tias khoom B thiab khoom C kuj nyob hauv qhov sib npaug ntawm thermal. Hauv qhov no, qhov kub ntawm khoom B = qhov kub ntawm khoom C.
Yog li txawm tias khoom B thiab khoom C tsis sib chwv, tab sis vim lawv sib chwv nrog khoom A, ces khoom B thiab khoom C kuj nyob hauv qhov sib npaug ntawm thermal.
Yog li, yog tias ob yam khoom nyob hauv qhov sib npaug ntawm thermal nrog ib yam khoom thib peb, ces peb yam khoom nyob hauv qhov sib npaug ntawm thermal nrog ib leeg. Qhov no yog Txoj Cai Zeroth ntawm Thermodynamics. Txoj Cai Zeroth ntawm Thermodynamics piav qhia txog lub hauv paus ntsiab lus ua haujlwm ntawm lub ntsuas kub, lub cuab yeej ntsuas kub. Kev tshuaj xyuas ntawm lub ntsuas kub mercury lossis lub ntsuas kub cawv. Cawv lossis mercury sib cuag nrog iav thiab iav sib cuag nrog cov khoom uas ntsuas qhov kub, xws li cua, dej lossis lub cev tib neeg. Txawm hais tias mercury tsis sib cuag nrog huab cua lossis dej lossis lub cev tib neeg, vim yog mercury sib cuag nrog iav,
thaum iav thiab cua lossis dej lossis lub cev tib neeg nyob hauv qhov sib npaug ntawm thermal, mercury, thiab cua lossis dej lossis lub cev tib neeg, kuj nyob hauv qhov sib npaug ntawm thermal.
Cov kev cai lij choj ntawm physics feem ntau pib ntawm 1, tsis tshua pib ntawm xoom. Hu ua thermodynamic 0 txoj cai vim tias, tom qab txoj cai thib 1 ntawm thermodynamics, txoj cai thib ob ntawm thermodynamics thiab txoj cai thib peb ntawm thermodynamics tau tsim, cov kws tshawb fawb tau pom tias muaj ib txoj cai tseem ceeb dua uas tsis tau tsim. Yog li ntawd, cov kws tshawb fawb hu qhov no ua Zeroth Txoj Cai ntawm Thermodynamics.
