Why does mineral oil have a higher viscosity than water if water has a stronger IMF?
Answer Yes you are absolutely right, intermolecular forces acting on the molecules in a liquid do have an effect on its viscosity. The viscosity of water has also the contribution of intermolecular forces like - hydrogen bonds which builds the viscosity of water.In the case of mineral oils which are mainly alkanes with mol weight in the range of C15-C40 and cyclic paraffins exhibit more intermolecular cohesion between layer of molecules because of their shape and size. The big molecules tend to get entangled one with the other and do not easily slip past over one another and therefore more resistant to flow than water. This explains why mineral oil is more viscous than water
Why is oil thicker than water but less dense?
Great question. It has to do with what the oil is made of and the spacing of the atoms. Oil is essentially made of compounds of C and H, with some P, N, S, and O. Carbon and hydrogen are lighterweight than oxygen. Water molecules are heavier than oil molecules dominated by carbon and hydrogen. Oil molecules are "stickier" and form a higher viscosity fluid. Water molecules are sticky too, but not as much as hydrocarbon molecules. Oil can have a lower density than water but it has a higher viscosity, making it thicker. Some oils are denser than water, but most are not. I would give you an A+ for your question.
Why is the viscosity of oil greater than water?
Water has far smaller molecules than oil, so the molecules in water can move easily past each other without transferring much momentum between layers that are moving at different velocity - leading to relatively low viscosity at normal temperature and pressure.Oil is a mixture of larger and longer molecules than water, they are linear and cyclic multi-carbon/hydrogen chains, so the molecules tend to get tangled up with each other - leading to a larger transfer of momentum between layers having different velocities, and thus to a higher viscosity.Density has nothing to do with viscosity.
What has higher viscosity- water or rubbing alcohol?
You had it right, but both of the above answers are wrong. The viscosity of isopropanol (rubbing alcohol) is 1.77cp @ 30C. Water is 0.80cp @ 30C. The correct order is water, IPA, oil, honey.
Why is oil more viscous then water?
Pheromones. Its all about Pheromones. Here is the equation. N (viscosity.)=12(pi)/pheromones + the radius of the container it is in. I know what I am talking about I teach high school phyhsics.
Water is denser than oil. That means for the same mass of oil and water, water has a lower volume. This points to higher inter molecular forces of attraction in water. But oil is more viscous than water so this points to higher molecular forces of attraction in oil. Which of these is true?
Water is a polar molecule and has far stronger intermolecular forces than oil which mostly has Van der Waals interactions, but it has far smaller molecules than oil, so the molecules in water can move easily past each other without transferring much momentum between layers that are moving at different velocity - leading to relatively low viscosity at normal temperature and pressure.Oil is a mixture of larger and longer molecules than water, they are linear and cyclic multi-carbon/hydrogen chains, so the molecules tend to get tangled up with each other - leading to a larger transfer of momentum between layers having different velocities, and thus to a higher viscosity.In general density is not just a function of intermolecular forces, of course, it also depends on the molecular mass versus size.
Why does water flow faster than oil even though oil is less dense than water?
I am doing an experiment where i am calculating the flow rates of milk, water and oil. Milk is more dense than water so it took more time to flow than water. But oil took more than than water and milk both to flow. But, oil has way less density. A help would be really appreciated! Thanks!
Why is ethanol less dense than water?
The hydrogen bonds in water pull the molecules much closer due to the oxygen part of the water molecule being attracted to the hydrogen part of another water molecule. In ethanol hydrogen bonds are not as strong as water . Its molecules can pack closely together,so space between water molecules is less than the space between alcohol molecules. which means that it has more mass in the same volume than ethanol. So, water is more dense than ethanol .
Are any oils more dense than water?
yes. bitumen sinks in water, it has a density of about 1005 kg/m3 vs pure water at 1000 kg/m3