All Questions
Tagged with intermolecular-forces dipole
27 questions
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Are van der Waals forces the same thing as intermolecular forces? [duplicate]
Like the name suggests, intermolecular forces are those between molecules and can be forces of attraction between permanent dipoles or temporary dipoles. However, it seems that the definition of van ...
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1
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1
answer
292
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Why does AsH3 have a higher boiling point than HBr?
Aside from the general trend of the boiling points of the hydrides, I noticed how the group 15 hydrides somehow "overtook" the group 17 ones in boiling point, which felt weird.
Notably, H-...
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0
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0
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46
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Should there be a better explanation on Van Der Waals force? [duplicate]
The explanation on how Van der Waals force forms is this: Van der Waals forces consist of induced, temporary dipoles between neighbouring molecules. These are caused by constantly shifting electron ...
- 171
3
votes
2
answers
1k
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What does Partial charge means in Dipole Dipole forces [duplicate]
Dipole-dipole forces act between the molecules possessing permanent dipole. Ends of the dipoles possess “partial charges” and these charges are shown by Greek letter delta (δ). Partial charges are ...
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8
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2
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597
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Differences between formulae for dipole–dipole interaction energy
I came across two formulae for dipole-dipole interaction energies on Chemistry LibreTexts — Dipole-Dipole Interactions:
$$V=-\frac{2\mu_1 \mu_2}{4\pi\epsilon_0r^3}\tag{3}$$
and
$$V=-\frac{2\mu^2_\...
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1
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3
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Why hydrogen bonds are stronger than Van der Waals forces?
Why the hydrogen bonds are more intense than Van der Waals forces in the case where the molecules with the Van der Waals forces have a stronger dipolar moment than the molecules with the hydrogen bond?...
- 201
2
votes
1
answer
1k
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Relative strength of intermolecular forces [duplicate]
My attempt at a solution:
First I look for hydrogen bonds:
The only compounds with hydrogen bonds are the second and fourth ones, so they have the strongest intermolecular forces. The second must have ...
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1
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0
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45
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it is possible for the hydrogen bond to form between the hydrogen chloride molecule, HCl? [duplicate]
Recently I'm doing my work, and I can't find what it is the answer. Can you guys help me?
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0
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1
answer
529
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dipole–dipole interactions: OCR Sample Paper wrong? [closed]
I was doing OCR A Level Chemistry A, H432/01 Periodic table, elements and physical Sample Question Paper.
Question 6 was:
The boiling point of hydrogen bromide is –67 ºC.
The boiling point of ...
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8
votes
1
answer
5k
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Why are the dispersion forces in CS2 stronger than the dipole-dipole forces in COS?
London dispersion forces supposedly have the least strength out of all the intermolecular forces. But $\ce{CS2}$, which has only dispersion forces, has a higher boiling point (and thus stronger ...
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0
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1
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174
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What are the intermolecular forces between polychloroethylene?
Does polychloroethylene have only van der Waals/London forces between its molecules? Surely, if all the chlorine atoms are on one side, due to the fact that chlorine is more electronegative than ...
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-2
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1
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London Dispersion Forces and Dipole-Dipole forces together? [closed]
How do London Dispersion Forces and Dipole-Dipole forces exist at the same time between polar molecules?
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14
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2
answers
2k
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How to identify hydrogen bonds and other non-covalent interactions from structure considerations?
Chemistry is governed by a wide range of interactions, from ionic and covalent bonding, or other types of strong interactions, towards weaker types of bonding, attraction, or repulsion, that typically ...
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14
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1
answer
784
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Dipole-quadrupole polarizability term for induced dipole
For describing an induced dipole, I have usually seen the following equation,
$$
P_{i} = \alpha_{ij}E_{j} + \frac{1}{2}\beta_{ijk}E_{j}E_{k}
$$
where $P_{i}$ is the $i^{\text{th}}$ component of the ...
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3
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1
answer
171
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What is the potential to use for non-dispersion interactions?
Although liquid argon’s intermolecular potential can be described using a Lennard-Jones (LJ) potential, which takes into account dispersion forces (induced dipole-induced dipole interactions), what ...
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2
votes
1
answer
4k
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Why are naturally occuring liquids more rare than solids and gasses on Earth? [closed]
There are only a few naturally occurring liquids I can think of on earth, such as water, mercury and animal oils.
Why are naturally occuring liquids more rare than solids and gasses on Earth?
To be ...
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2
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0
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595
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Boiling point and Intermolecular forces
After looking for proper reasons for boiling point orders, nobody could even explain why $\ce{CCl4}$ has a higher boiling point than $\ce{SiCl4}$, but after looking for patterns, in lots and cases of $...
- 1,185
8
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1
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Trend in the boiling point of the hydrogen halides
The boiling points of the hydrogen halides are as follows:
$$\begin{array}{cc}
\hline
\text{Species} & \text{Boiling point / }\mathrm{^\circ C} \\
\hline
\ce{HCl} & -85.1 \\
\ce{HBr} & -...
24
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3
answers
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Is Hydrogen Bonding a Type of Dipole Dipole Interaction?
I understand that dipole dipole forces is due to the attraction of the different partials charges of atoms in different molecules due to their different electro-negativities.
For hydrogen bonding, ...
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10
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3
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At what frequency does a non-polar molecule acquire a dipole able to participate in London Dispersion forces?
London Dispersion forces are forces between non-polar non-ionic molecules that the random fluctuation of their electrons makes them temporarily dipoles.
What is the frequency that this occurs?
Every ...
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4
votes
1
answer
644
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Bending of water and methanol towards a charged objects
I just had a question about why does water, methanol or any other polar substances tend to bend towards the charged object.
I think it is because of a slight dipole dipole movement between the ...
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13
votes
1
answer
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Is an ionic bond more like a covalent bond or an intermolecular force?
I have asked a question loosely asking this, where I confused terms and did not specify what I wanted to know here, so I formed a new question.
What are the differences and similarities between ionic ...
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7
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4
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Why is tetrafluoromethane non-polar and fluoroform polar?
Consider the Lewis dot structures of the molecules fluoroform, $\ce{CHF3}$, and tetrafluoromethane, $\ce{CF4}$:
My first line of thought is that both of these molecules are symmetrical (the ...
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2
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123
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Why is there a greater degree of separation in a dipole-dipole interaction?
My textbook says this:
Electrostatic forces between two ions decrease by the factor $\frac{1}{d^2}$ as their separation distance, $d$, increases. Dipole–dipole forces, however, vary as $\frac{1}{d^...
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12
votes
2
answers
11k
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Which intermolecular interaction is dependent on the inverse cube of distance?
The intermolecular interaction that is dependent on the inverse cube of distance between molecules is:
hydrogen bond
ion-ion interaction
ion-dipole interaction
London force
Inverse ...
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1
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0
answers
133
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Is the momentary dipole in between a cell membrane due to the van-der-Waals forces?
There are van-der-Waals forces within non-polar molecules. I read it that is mainly due to the instantaneous movements of the electron cloud's distribution. When looking at symmetrical molecules like $...
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2
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2
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28k
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How do I figure out the relative polarity of organic compounds?
It's a question on my quiz which I guessed right and couldn't do the reasoning:
Based on the intermolecular forces, predict the boiling points of the following substances and list them in the order ...
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