We found in an experiment using Ostwalds method that ethanol is more viscous than water, which is already surprising as water has stronger intermolecular bonds than ethanol as @MaxW pointed out. The mixture of both substances furthermore is significantly more viscous than both individual substances.
Is water more viscous than alcohol?
The viscosity of pure alcohols and aqueous solutions is found to increase almost linearly with increasing pressure, whereas that of water decreases slightly with pressure at temperatures below 298 K.
Which has more viscosity ethanol or water?
you have gotten the question backwards. Ethanol is more viscous than water but not by much. Of course it will depend on temperature. But at 20°C, viscosity of ethanol (C2H5OH) is 0.0119 dynes/cm ^2 per unit velocity gradient) and water is 0.01002 or 16% less than alcohol.
What is the viscosity of alcohol?
| Fluid Absolute Viscosity | (N s/m 2 , Pa s) (10 – 4 lb/s ft) | Acetone 0.000316 2.12 | Alcohol, ethyl (ethanol) 0.001095 7.36 | Alcohol, methyl (methanol) 0.00056 3.76 |
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Which fluid has the highest viscosity?
One of the most viscous liquids known is pitch, also known as bitumen, asphalt, or tar . Demonstrating its flow and measuring its viscosity is the subject of the longest continuously running scientific experiment, begun in 1927 at the University of Queensland in Australia.
What liquid has lowest viscosity?
Water, gasoline , and other liquids that flow freely have a low viscosity. Honey, syrup, motor oil, and other liquids that do not flow freely, like those shown in Figure 1, have higher viscosities.
Which is more viscous water or honey?
So, we can say that intermolecular forces decide the viscosity of the fluid. – In water, only water molecules are there. ... That results in the resistance to the deformation in the fluid. So, we can say that due to more intermolecular forces, honey is more viscous than water .
Does ethanol has a high viscosity?
Since the polar hydrogen of one alcohol can hydrogen bond with the oxygen of another molecule, there is a good deal of intermolecular hydrogen bonding in alcohols. ... That is just what is observed – glycerol is far more viscous than water or simple alcohols such as methanol or ethanol , whose viscosity is much like water.
What is highly viscous?
A fluid that is highly viscous has a high resistance (like having more friction) and flows slower than a low-viscosity fluid. To think of viscosity in everyday terms, the easier a fluid moves, the lower the viscosity. ... Honey would move slower than water, so honey would have a greater viscosity.
Which is the most viscous?
So, glycerine is found to be the most viscous liquid.
How is viscosity calculated?
There are several formulas and equations to calculate viscosity, the most common of which is Viscosity = (2 x (ball density – liquid density) x g x a^2) ÷ (9 x v) , where g = acceleration due to gravity = 9.8 m/s^2, a = radius of ball bearing, and v = velocity of ball bearing through liquid.
How does alcohol affect viscosity?
As for the composition dependence of the viscosity, a distinct maximum appears near 0.3–0.4 mole fraction of alcohol on all isobars at each temperature. The viscosity maximum shifts gradually to a higher alcohol concentration with increasing temperature and pressure.
What is the unit of viscosity?
Dynamic viscosity: The SI physical unit of dynamic viscosity (μ) is the Pascal-second (Pa s) , which is identical to 1 kg m − 1 s − 1 . The physical unit for dynamic viscosity in the centimeter gram second system of units (cgs) is the poise (P), named after Jean Poiseuille.
Does peanut butter have a high viscosity?
| Fluid Viscosity (cPs) | Peanut Butter 250,000.0 |
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What liquid has the same viscosity as blood?
At normal body temperature (37 degrees Celsius), blood is four times more viscous than water but only slightly denser. As a result, it flows more slowly and it is stickier than water. Corn syrup or honey , on the other hand, are far more viscous (more than thousand times) than blood.
Is high viscosity thick or thin?
Viscosity describes a fluid’s internal resistance to flow and may be thought of as a measure of fluid friction. Thus, water is “thin”, having a low viscosity, while vegetable oil is “thick” having a high viscosity .
