Dab tsi yog enthalpy ntawm benzene?
Dab tsi yog enthalpy ntawm benzene?

Video: Dab tsi yog enthalpy ntawm benzene?

Video: Dab tsi yog enthalpy ntawm benzene?
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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.

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