Yl10_vast - 1 Vesinikasiidi(HN3 aururhk 22,75 C juures on...

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1. Vesinikasiidi (HN 3 ) aururõhk –22,75 °C juures on 58 torri ja 25,0 °C juures 512 torri. Arvutage vesinikasiidi standardne aurustumisentalpia, standardne aurustumisentroopia, standardne aurustumise vabaenergia, keemistemperatuur normaaltingimustel. Vastus : 28.31 kJ/mol; 91.7 J/(K*mol); 983 J/mol; 308.7 K 2. Heeliumi faasidiagramm on toodud kõrval. Milline on vedela He-II eksisteerimise maksimaalne temperatuur? Milline on heeliumi normaalne keemistemperatuur? Kas tahke heelium saab sublimeeruda? 3. Süsiniku faasidiagramm on toodud kõrval. Millist rõhku on vaja rakendada, et 2000 K juures muuta grafiit teemandiks? Milline on minimaalne temperatuur vedela süsiniku eksisteerimiseks rõhul 10 000 atm? Millise rõhu juures sulab grafiit, kui temperatuur on 3000 K? Kas teemandid on normaaltingimustel stabiilsed? 4. Kumb lahusti, vesi või benseen, lahustab paremini järgmisi aineid ja miks? KCl CCl 4 CH 3 COOH 5. Otsustage, kas järgmised funktsionaalrühmad on hüdrofiilsed või hüdrofoobsed.
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