(a) Interpretation: The approximate temperature at which the steam distillation occurs should be determined. Concept introduction: Boiling occurs when the total vapor pressure of two immiscible liquids equals to atmospheric pressure (1 atm). So by steam distillation, organic compounds which are insoluble in water can be extracted in low temperature without decomposition.
(a) Interpretation: The approximate temperature at which the steam distillation occurs should be determined. Concept introduction: Boiling occurs when the total vapor pressure of two immiscible liquids equals to atmospheric pressure (1 atm). So by steam distillation, organic compounds which are insoluble in water can be extracted in low temperature without decomposition.
Solution Summary: The author explains that the approximate temperature at which steam distillation occurs should be determined.
The approximate temperature at which the steam distillation occurs should be determined.
Concept introduction:
Boiling occurs when the total vapor pressure of two immiscible liquids equals to atmospheric pressure (1 atm). So by steam distillation, organic compounds which are insoluble in water can be extracted in low temperature without decomposition.
Interpretation Introduction
(b)
Interpretation:
Why the proportions of the two liquids condensed from the vapor is independent of the composition of the boiling mixture, as long as both liquids are present in the boiling mixture should be explained.
Concept introduction:
A liquid boils when vapor pressure of the liquid equals to external pressure. Vapor pressure of a liquid at a certain temperature depends on its enthalpy of vaporization, when the enthalpy of vaporization is low; vapor pressure of the liquid at a certain temperature is high, because it needs less energy to escape into vapor phase.
Interpretation Introduction
(c)
Interpretation:
Which of the two liquids, water or Cinnamaldehyde, condenses in the greater quantity by mass should be explained.
Concept introduction:
Boiling point depends on intermolecular forces. Higher the intermolecular forces, higher the boiling point. Hence, a liquid with higher boiling point will have a lower vapor pressure at certain temperature compared to a liquid with lower boiling point. However liquid starts to boil when the vapor pressure of the liquid equals to external pressure.
16. The proton NMR spectral information shown in this problem is for a compound with formula
CioH,N. Expansions are shown for the region from 8.7 to 7.0 ppm. The normal carbon-13 spec-
tral results, including DEPT-135 and DEPT-90 results, are tabulated:
7
J
Normal Carbon
DEPT-135
DEPT-90
19 ppm
Positive
No peak
122
Positive
Positive
cus
и
124
Positive
Positive
126
Positive
Positive
128
No peak
No peak
4°
129
Positive
Positive
130
Positive
Positive
(144
No peak
No peak
148
No peak
No peak
150
Positive
Positive
してし
3. Propose a synthesis for the following transformation. Do not draw an arrow-pushing
mechanism below, but make sure to draw the product of each proposed step (3 points).
+ En
CN
CN
Show work..don't give Ai generated solution...
Chapter 14 Solutions
General Chemistry: Principles And Modern Applications Plus Mastering Chemistry With Pearson Etext -- Access Card Package (11th Edition)