Yuav Lej Li Cas Kom Tshav Kub Tshwj Xeeb: 6 Kauj Ruam (nrog Duab)

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Yuav Lej Li Cas Kom Tshav Kub Tshwj Xeeb: 6 Kauj Ruam (nrog Duab)
Yuav Lej Li Cas Kom Tshav Kub Tshwj Xeeb: 6 Kauj Ruam (nrog Duab)

Video: Yuav Lej Li Cas Kom Tshav Kub Tshwj Xeeb: 6 Kauj Ruam (nrog Duab)

Video: Yuav Lej Li Cas Kom Tshav Kub Tshwj Xeeb: 6 Kauj Ruam (nrog Duab)
Video: Nraug txuj kev hlub 2024, Lub peb hlis ntuj
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Cov cua sov tshwj xeeb yog tus nqi ntawm lub zog xav tau los txhawb nqa ib gram ntawm cov khoom uas koj yuav muab los ntawm ib qib centigrade. Cov cua sov tshwj xeeb ntawm cov tshuaj nyob ntawm ob qho tib si nws cov qauv txheej txheem thiab nws qib. Kev tshawb pom ntawm cov cuab yeej no fermented cov kev tshawb fawb ntawm thermodynamics, txoj kev tshawb fawb ntawm kev hloov pauv lub zog uas cuam tshuam nrog cov cua sov thiab ua haujlwm ntawm ib qho system. Cov cua sov tshwj xeeb thiab cov ntsuas cua sov tau siv dav hauv kev siv tshuaj lom neeg, kev tsim hluav taws xob nuclear thiab aerodynamics, nrog rau kev ua neej nyob niaj hnub hauv tsheb hluav taws xob thiab cua txias. Yog tias koj xav paub yuav suav li cas tshwj xeeb cov cua sov, ua raws cov kauj ruam yooj yim no:

cov kauj ruam

Txoj Kev 1 ntawm 2: Txoj Kev 1 ntawm 2: Kawm Cov Hauv Paus

Xam Cov Cua Kub Tshwj Xeeb Kauj Ruam 1
Xam Cov Cua Kub Tshwj Xeeb Kauj Ruam 1

Kauj Ruam 1. Paub koj tus kheej nrog cov ntsiab lus siv hauv kev suav cov cua sov tshwj xeeb

Nws yog ib qho tseem ceeb kom paub cov ntsiab lus siv hauv kev suav cov cua sov tshwj xeeb ua ntej kawm cov mis. Koj yuav tsum muaj peev xwm paub lub cim rau txhua lub sijhawm thiab nkag siab tias nws txhais li cas. Nov yog cov ntsiab lus nquag siv hauv kab zauv rau xam cov cua sov tshwj xeeb ntawm cov khoom:

  • Delta, lossis lub cim " ", Sawv cev rau kev hloov pauv hauv qhov sib txawv.

    Piv txwv li, yog koj thawj qhov kub (T1) yog 150 ° C thiab thib ob (T220 ° C, yog li ntawd - T, lossis qhov sib txawv ntawm qhov kub, sawv cev 150 ° C - 20 ° C, lossis 130 ° C.

  • Cov qauv loj yog sawv cev los ntawm " m ”.
  • Tus nqi cua sov yog sawv cev los ntawm " Q", Raug sawv cev los ntawm chav tsev" J", Los yog Joule.
  • T"Yog qhov kub ntawm cov khoom.
  • Cov cua sov tshwj xeeb yog sawv cev los ntawm " Çrau ”.
Xam Cov Kev Kub Kub Tshwj Xeeb 2
Xam Cov Kev Kub Kub Tshwj Xeeb 2

Kauj Ruam 2. Kawm qhov sib npaug rau cov cua sov tshwj xeeb

Thaum koj paub txog cov lus siv hauv kev suav cov cua sov tshwj xeeb, koj yuav tsum kawm qhov sib npaug rau nrhiav qhov tshwj xeeb cua sov ntawm cov khoom. Cov mis yog: Çrau = Q/m∆T.

  • Koj tuaj yeem siv cov mis no yog tias koj xav pom qhov sib txawv ntawm cov cua sov ntau dua li cov cua sov tshwj xeeb. Nws yuav zoo li no:

    =Q = mCrau-T

Txoj Kev 2 ntawm 2: Txoj Kev 2 ntawm 2: Xam Cov Cua Kub Tshwj Xeeb

Xam Cov Kev Kub Kub Tshwj Xeeb 3
Xam Cov Kev Kub Kub Tshwj Xeeb 3

Kauj Ruam 1. Kawm qhov sib npaug

Ua ntej, koj yuav tsum saib ntawm qhov sib npaug kom tau txais lub tswv yim ntawm qhov nws yuav coj mus nrhiav qhov tshwj xeeb cua sov. Cia peb saib cov teeb meem hauv qab no: Nrhiav cov cua sov tshwj xeeb ntawm 350 g ntawm cov khoom siv tsis paub thaum 34,700 Joules ntawm tshav kub tau thov thiab qhov kub tau nce los ntawm 22 ° C txog 173 ° C yam tsis hloov pauv.

Xam Cov Kev Kub Kub Tshwj Xeeb 4
Xam Cov Kev Kub Kub Tshwj Xeeb 4

Kauj Ruam 2. Sau cov npe paub thiab yam tsis paub

Thaum koj nyob zoo nrog qhov teeb meem, koj tuaj yeem sau txhua qhov paub thiab tsis paub sib txawv kom nkag siab zoo txog yam koj yuav ua haujlwm nrog. Nov yog yuav ua li cas:

  • m = 350g
  • Q = 34,700 Joules
  • - T = 173 ° C - 22 ° C = 151 ° C
  • Çrau = Tsis paub
Xam Cov Kub Kub Tshwj Xeeb 5
Xam Cov Kub Kub Tshwj Xeeb 5

Kauj Ruam 3. Nkag mus rau yam paub hauv kab zauv

Koj paub tus nqi ntawm txhua qhov hloov pauv tshwj tsis yog " Çrau"Thiab yog li ntawd yuav tsum nkag mus rau yam tseem ceeb hauv tus lej qub thiab daws qhov txiaj ntsig ntawm" Çrau ”. Nov yog yuav ua li cas:

  • Thawj qhov sib npaug: Çrau = Q/m∆T
  • c = 34,700 J/(350 g x 151 ° C)
Xam Cov Kev Kub Kub Tshwj Xeeb 6
Xam Cov Kev Kub Kub Tshwj Xeeb 6

Kauj Ruam 4. Txhim kho qhov sib npaug

Tam sim no qhov paub paub tau muab tso rau hauv qhov sib npaug, siv cov lej yooj yim los daws nws. Cov cua sov tshwj xeeb, lossis cov lus teb zaum kawg, yuav yog 0. 65657521286 J/(g x ° C).

  • Çrau = 34,700 J/(350 g x 151 ° C)
  • Çrau = 34,700 J/(52,850 g x ° C)
  • Çrau = 0.65657521286 J/(g x ° C)

Lub tswv yim

  • Cov hlau ua kom sov sai dua li dej vim nws cov cua sov tshwj xeeb.
  • Thaum daws rau qee qhov nqi cua sov tshwj xeeb, tshem tawm cov chav hla thaum ua tau.
  • Qee zaum calorimeter tuaj yeem siv nrog kev hloov cua sov thaum lub cev hloov lossis tshuaj.
  • Cov cua sov tshwj xeeb ntawm ntau yam khoom tuaj yeem nrhiav tau hauv is taws nem rau kev ua pov thawj.
  • Kev hloov pauv kub ntau dua hauv cov khoom siv nrog cov cua sov tshwj xeeb tsawg heev thaum txhua lwm yam yam ntxwv sib npaug.
  • Chav nyob ntawm SI (Système International) rau cov cua sov tshwj xeeb yog Joules ib qib centigrade ib gram.
  • Kawm paub cov mis rau xam cov cua sov tshwj xeeb hauv cov zaub mov. Çrau = 4, 180w + 1, 711p + 1, 928f + 1, 547c + 0.908a yog qhov sib npaug siv los nrhiav cov cua sov tshwj xeeb ntawm cov zaub mov, qhov twg " w"Yog feem pua ntawm cov zaub mov ua los ntawm dej," rau"Yog feem pua ntawm cov zaub mov ua los ntawm cov protein," f"Yog feem pua ntawm cov zaub mov ua los ntawm cov rog," ç"Yog qhov feem pua ntawm cov zaub mov ua los ntawm carbohydrates thiab" Cov"Yog feem pua ntawm cov zaub mov ua los ntawm tshauv. Qhov kev ua zauv no suav nrog qhov faib loj (x) ntawm txhua cov khib nyiab uas ua zaub mov noj. Kev suav rau cov cua sov tshwj xeeb tau qhia hauv kJ/(kg-K).

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