Video: Vim li cas acetylene c2h2 G qee zaum hu ua endothermic compound?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Yog vim li cas acetylene , C2H2 ( g ), qee zaum hu ib “ endothermic ” compound ? A. Lub combustion ntawm acetylene nyob rau hauv oxygen tsim hluav taws kub uas absorbs cua sov. Kua thiab gaseous acetylene ob leeg txias rau qhov kov.
Yog li ntawd, hom tshuaj twg yog c2h2?
Acetylene yog ib qho tshuaj lom neeg tshawb pom los ntawm Edmund Davy hauv xyoo 1836 uas tsim los ntawm kev sib txuas ntawm ob lub carbon thiab ob lub hydrogen atoms. Cov mis molecular ntawm acetylene yog C2H2. Nws qhov hnyav molecular yog 26.04g / mol. Cov roj tsis muaj xim nrog me ntsis solubility hauv dej, acetylene muaj tus ntxhiab tsw txawv.
Tsis tas li ntawd, dab tsi yog qhov hloov pauv enthalpy ib mole ntawm acetylene? Enthalpy ntawm combustion
| Tshuaj | Combustion Reaction | Enthalpy ntawm Combustion, ΔH∘c (kJmolat 25∘C) |
|---|---|---|
| acetylene | C2H2(g)+52O2(g)?2CO2(g)+H2O(l) | −1301.1 |
| ethanol | C2H5OH(l)+3O2(g)?2CO2(g)+3H2O(l) | −1366.8 |
| methanol | CH3OH(l)+32O2(g)?CO2(g)+2H2O(l) | −726.1 |
| isooctane | C8H18(l)+252O2(g)?8CO2(g)+9H2O(l) | −5461 |
Qhov thib ob, dab tsi yog qhov enthalpy ntawm combustion ntawm acetylene?
-1299 kJ/mol
Dab tsi yog qhov ceev ntawm c2h2?
1.1 kg/m³
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