C) KCl D) C6H14 True or False (3 pts. Each) 1. Acetone (CH3COCH3)flows easier in
ID: 815343 • Letter: C
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C) KCl D) C6H14 True or False (3 pts. Each) 1. Acetone (CH3COCH3)flows easier in comparison to ethylene glycol(HOCH2CH2OH) 2. At the of mount Everest, the world?s tallest peak, water boils at a 100 degree C 3. Diamond is an example of a network crystal. 4. Supercritical CO2 is an excellent solvent in the decaffeination process because it has the density and viscosity of that of a gas. 5. Bottled carbonated beverages fizz when the bottle is opened because the sudden drop in pressure causes a sudden drop in gas solubility. 6. When mixing two liquids the enthalpy of solution is calculated through a two step process. 7. Micelles which are created by the hydrophilic and hydrophobic properties of surfactants often stabilizes emulsions True or flash number 1 6 7 please explainExplanation / Answer
1) Because its molecules can slide around each other, a liquid has the ability to flow. The resistance to such flow is called viscosity. The tighter the molecules are linked, the more the substance will resist deformation, i.e. the less it will be willing to flow. Acetone is a smaller molecule and cannot form hydrogen bonds between molecules as ethyleneglycol does. It is expected, then, that acetone will flow easier.
6) The two step process is often use when you are calculating enthalpy of solution of a solid being dissolved in a liquid.
7) An emulsion is a mixture of two or more liquids that are normally immiscible (unmixable or unblendable). Micelle is an aggregate of surfactantmolecules dispersed in a liquid colloid. A typical micelle in aqueous solution forms an aggregate with thehydrophilic "head" regions in contact with surrounding solvent, sequestering the hydrophobic single-tail regions in the micelle centre.
Micelles stabilize emulsions because they direct the hydrophilic head to the polar phase and the hydrophobic tail to the non polar phase, decreasing the free energy of the system.
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