Chem 106 Fin Spring 2016 Multiple Choice Identify the choice that best completes
ID: 998571 • Letter: C
Question
Chem 106 Fin Spring 2016 Multiple Choice Identify the choice that best completes the statement or answers the Based on their boiling points, which of the following compounds has the largest dipole -dipole I chloride 4249 K 2. A substance that is but a substance that is will be insoluble in water, will be soluble in water. 3. Which of the substances a d in the following figure has the weakest intermolecular forces? 4. Which of the solutions shown here will have the highest vapor pressure? White circles indicate solvent molecules; black circles indicate molecules of a nonvolatile solute.Explanation / Answer
1) c
Higher the boiling point, larger the dipole-dipole interaction
Therefore, answer = c acetonitrile
2) A substance that is hydrophobic will be insoluble in water.
A substance that is hydrophilic will be soluble in water.
6) Ans = a only I
At equilibrium , only Gmix = 0
7) T = Ho/So
= 58.02 kJ/mol / 176.1 J/mol/K
= 58020 J/mol / 176.1 J/mol/K
= 329.5 K
= 329.5 -273 oC
= + 56.5 oC
8) Ans = increase by a factor 5
rate = k [CHCl3] [Cl2]
Given that concentration of CHCl3 increased by a factor 5.
Then,
rate = k [5CHCl3] [Cl2] = 5 . k [CHCl3] [Cl2]
Therefore,
rate will increase by a factor 5.
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