A) TRUE B) FALSE U. Heats of vaporization are greater than heats of fusion 800 34.6°C...

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A) TRUE B) FALSE U. Heats of vaporization are greater than heats of fusion 800 34.6°C 760 783C 10 Normal boiling 600 Diethyl/ point Ethyl alcohol (ethanol) Water Ethylene glycol 20 40 60 80 100 Temperature (00 11. Based on the figure above, the boiling point of diethyl ether under an external pressure of 0.605 atm is A40 B) 10 C) 30 D) 20 E) 0 12. What is the predominant intermolecular foree in HCN? A) dipole-dipole attraction B) ion-dipole attraction C) ionic bonding D) hydrogen bonding E) London dispersion forces

13. With A) LiCI B) SiH4 C) CH3 D) C3H7OH Е) ОСЬ what compound will NH3 experience only ion-dipole intermolecular forces? N H3 1,000 800 P (torr) 600 400 200 -10 0 10 20 30 40 50 60 T (°C) 14. According to the phase diagram shown above, what is the normal boiling point (C)? A) 10 B)-3 C) 38 D) 29 E) 0 15. According to the phase diagram shown above, what is the normal melting point (°C)? A)-13 B) 0 C) 38 D) 10 E) 29

A) monoclinic B) body-centered cubic G primitive cubic D) face-centered cubic E) spherical cubic 3. What is the predominant intramolecular force in NaNO3? -A) ionic bonding B) ion-dipole attraction C) dipole-dipole attraction D) hydrogen bonding E) London-dispersion forces 4. Which one of the following exhibits dipole-dipole attraction between molecule A) NH3 B) CF4 C) C1oH22 D) O2 E) SF6

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