Two isomers of C2H2F2 are shown. Circle the one that you would you expect to have the highest boiling point and explain your reasoning. H. H. H. F isomer A isomer B
Two isomers of C2H2F2 are shown. Circle the one that you would you expect to have the highest boiling point and explain your reasoning. H. H. H. F isomer A isomer B
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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### Comparing Boiling Points of C₂H₂F₂ Isomers
**Question:**
Two isomers of C₂H₂F₂ are shown. Circle the one that you would expect to have the highest boiling point and explain your reasoning.
**Isomer Structures:**
- **Isomer A:**
```
F H
\ /
C=C
/ \
H F
```
- **Isomer B:**
```
H H
\ /
C=C
/ \
F F
```
**Explanation:**
When analyzing boiling points of isomers, it is important to consider factors such as molecular structure, intermolecular forces, and symmetry.
1. **Intermolecular Forces:**
- Isomer A features dipole interaction because of the polar nature of the C-F bond.
- Isomer B likely has stronger dispersion forces due to the greater surface area for temporary dipoles, given that both sides have fluorine atoms, augmenting Van der Waals forces.
2. **Molecular Symmetry:**
- Isomer A has a less symmetrical structure which can influence the intermolecular forces differently compared to the more symmetrical Isomer B.
3. **Polarity Contribution:**
- Isomer A can have a net dipole moment due to asymmetrical F and H arrangement, possibly resulting in a higher boiling point due to dipole-dipole interactions.
Considering these points, **Isomer A** might have the higher boiling point because the presence of polar C-F bonds and asymmetry could lead to significant dipole-dipole interactions that require more energy to break during the phase transition from liquid to gas.
**Graphical Representation:**
Unfortunately, no graphs or charts were provided in the image to further explain the concepts visually.
*Note: The final conclusion should be backed by experimental data to validate the theoretical reasoning provided.*
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Transcribed Image Text:---
### Comparing Boiling Points of C₂H₂F₂ Isomers
**Question:**
Two isomers of C₂H₂F₂ are shown. Circle the one that you would expect to have the highest boiling point and explain your reasoning.
**Isomer Structures:**
- **Isomer A:**
```
F H
\ /
C=C
/ \
H F
```
- **Isomer B:**
```
H H
\ /
C=C
/ \
F F
```
**Explanation:**
When analyzing boiling points of isomers, it is important to consider factors such as molecular structure, intermolecular forces, and symmetry.
1. **Intermolecular Forces:**
- Isomer A features dipole interaction because of the polar nature of the C-F bond.
- Isomer B likely has stronger dispersion forces due to the greater surface area for temporary dipoles, given that both sides have fluorine atoms, augmenting Van der Waals forces.
2. **Molecular Symmetry:**
- Isomer A has a less symmetrical structure which can influence the intermolecular forces differently compared to the more symmetrical Isomer B.
3. **Polarity Contribution:**
- Isomer A can have a net dipole moment due to asymmetrical F and H arrangement, possibly resulting in a higher boiling point due to dipole-dipole interactions.
Considering these points, **Isomer A** might have the higher boiling point because the presence of polar C-F bonds and asymmetry could lead to significant dipole-dipole interactions that require more energy to break during the phase transition from liquid to gas.
**Graphical Representation:**
Unfortunately, no graphs or charts were provided in the image to further explain the concepts visually.
*Note: The final conclusion should be backed by experimental data to validate the theoretical reasoning provided.*
---
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