Video: Dab tsi yog enthalpy ntawm benzene?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Thermodynamic zog
| Theem tus cwj pwm | |
|---|---|
| Std enthalpy hloov kev tsim, ΔfHoua kua | 48.7 kJ/mol |
| Standard molar entropy, Soua kua | 173.26 J / (mol K) |
| Enthalpy ntawm combustion, ΔcHo | -3273 kJ/mol |
| Kub peev, cp | 134.8 J / (mol K) |
Tib neeg kuj nug, dab tsi yog qhov enthalpy ntawm kev tsim ntawm benzene?
Tus qauv enthalpy ntawm combustion ntawm Benzene yog -3266.0 kJ thiab tus qauv enthalpy ntawm kev tsim CO2 thiab H2O yog -393.1 kJ thiab -286.0 kJ feem.
Tsis tas li ntawd, vim li cas benzene muaj cua sov tsawg ntawm kev tsim? Qhov ntau kub tso tawm, qhov tsis zoo tus nqi ntau dua. Benzene tso tawm tsawg cua sov ( muaj cua sov qis ntawm hydrogenation) vim nws cov khoom muaj ntxhiab uas ua rau nws zoo kawg li stability.
Tsis tas li ntawd, nyob rau hauv dab tsi kub yog benzene kua thiab roj?
Oxygen yog a gas hauv chav kub . Yog hais tias ib txwm melting point ntawm ib yam khoom nyob rau hauv qab chav tsev kub , cov khoom yog a ua kua hauv chav kub . Benzene melts ntawm 6 ° C thiab boils ntawm 80 ° C; nws yog a ua kua hauv chav kub.
benzene zoo li cas?
Benzene yog cov kua uas tsis muaj xim uas muaj ntxhiab tsw qab. Nws evaporates rau saum huab cua sai heev thiab yaj me ntsis hauv dej. Benzene tshwm raws li cov kua ntshiab tsis muaj xim nrog cov roj av- nyiam tsw. Flash point tsawg dua 0 ° F.
Pom zoo:
Dab tsi yog txhais los ntawm tus qauv enthalpy ntawm cov tshuaj tiv thaiv?
Tus txheej txheem enthalpy ntawm cov tshuaj tiv thaiv (tus cim Δ Hr?) yog qhov hloov pauv enthalpy uas tshwm sim hauv lub cev thaum teeb meem hloov pauv los ntawm cov tshuaj tiv thaiv tshuaj, thaum tag nrho cov reactants thiab cov khoom nyob rau hauv lawv cov txheej txheem. Rau ib tug generic tshuaj tiv thaiv
Dab tsi yog qhov enthalpy ntawm kev tsim ntawm Cao?
Table of Heats of Formation Compound ΔHf (kJ/mol) CaCO3 -1207.0 CaO(s) -635.5 Ca(OH)2(s) -986.6 CaSO4(s) -1432.7
Dab tsi yog tag nrho geometry ntawm lub nplhaib benzene?
Lub nplhaib benzene muaj rau carbon atoms sib koom ua ke nyob rau hauv ib lub tiaj tiaj lossis lub nplhaib hexagon. Txhua cov pa roj carbon yog sib koom ua ke rau ib qho hydrogen vim yog peb qhov sib hloov ob daim ntawv cog lus. Qhov no qhia tau hais tias txhua cov pa roj carbon monoxide yog sib koom ua ke rau 3 lwm tus thiab ib lub pob txha ob leeg. Yog li cov molecular geometry ntawm txhua carbon yog trigonal planar
Dab tsi yog qhov tshwj xeeb kub ntawm benzene?
Disabling koj adblocker ntawm lub EngineeringToolBox!•• Yuav ua li cas? Benzene Gas -C6H6 Kub - T - (K) Kub Kub - cp - (kJ/(kg K)) 350 1.255 375 1.347 400 1.435
Dab tsi yog qhov flux los ntawm lub voos xwmfab ntawm sab yog tias tus nqi ntawm Q yog ntawm ib qho ntawm nws lub ces kaum?
Raws li peb paub tias, tag nrho cov flux los ntawm tus nqi q yog q / ε 0 (Gauss txoj cai). Yog hais tias tus nqi yog nyob rau ntawm lub ces kaum ntawm lub voos xwmfab, ib co ntawm cov flux nkag mus rau hauv lub voos xwmfab thiab tawm los ntawm ib co ntawm nws lub ntsej muag. Tab sis qee qhov flux tsis nkag mus rau hauv lub voos xwmfab. Qhov 1/8th no yuav muab faib ua 3 ntu dua