What's the reason of volume increase during liquid-liquid dissolving?!?
437257
There doesn't always have to be a volume increase when two liquids are mixed.  For example, if you mix one liter of water with one liter of ethanol, you get less than two liters.  The reason for this is molecule-molecule interaction.  The hydrogen bonding between water and ethanol molecules is greater than that between two water molecules or two ethanol molecules.  Therefore, if water and ethanol are mixed, the bonding is strong, pulling the molecules closer together and reducing the sum of the two pure volumes.
528373
It has to do with the "activiation energy" involved in the process, increasing the stirring rate in a certain manner, increases the rate of collisions which increases the rate of reactions.  Solubility has to do with the free energy which are state functions with respect to temperature; the reactant and product states. Rates of reactions pertain more towards transitions states.
107278
the pressure rises.  this is because the molecules move faster.  if you want a formula use PV=nRT.  solve for P to get  P = (nRT)/V .\n\nsince the can is sealed, Volume stays the same.  R is a constant value anyway, n is the number of moles, which stays the same.  if you increase T, then P has to increase as well
900560
Most solutes (sugar in this case) have limited solubility (ability to dissolve) in most solvents (water in this case). This solubility varies with temperature - the hotter the solution, the higher the solubility. As mentioned in an earlier answer, this means more energy must be added to dissolve more solute. On the other hand, if energy is taken out of a solution, the solute will usually  come out of the solution, depending on the concentration.\n\nThis physical law that governs this is the 2nd law of thermodyamics.
101321
Good question.\n\nPressure of the trapped gas is supposed to decrease with lowering the temperature.\n\nBut, water increases in volume as its temperature is increased below 4 degree C. In other words, water has the maximum density at 4 degree C. Increasing or decreasing its temperature from that point will make it expand.
143717
evaporation would decrease the mass per unit volume of sea water..as the latent heat for vaporization will evaporate the water...there will lesser and lesser mass per unit volume, which will in turn decrease the density (m/V). Also due to evaporation the amount soluble water will get into vapor phase leaving behind the salts...so the salinity will increase..and yeah salinity is defined as the amount of dissolved salts in water...(normally in psu in oceanographic sense)...so more water gets evaporated, the dissolved salts get more compared to the dissolving solvent , which in this case the water...so the amount of salt increases relative to the water..
987678
Liquids have a definite volume but no definite shape, therefor only volume change occurs with change in temperature. But, liquids have to be in a container... so...\nwhen you heat them the contianer expands too. The real expansion = the apparrent expansion(what it looks like) after you allow for the expansion of the container.
773889
Suspected trick question.  The volumes included are irrelevant.  You know the molecular weight (66000 Da) and you know how many micromoles you need total in each solution.  What does it matter if the one micromole is in 1 ml or 10K gallons?  You know it only contains one micromole.  Divide the molecular weight by 10^6 and you're done.  (or you have not stated the problem correctly)
959876
a) the hydration energy is greater because the temp decreases. When you go from a low potential energy substance to a high potential energy substance the temp of solution will decrease.\n\nb) the solubilty will increase because energy is on the reactant side of the equation. (the reaction is endothermic and requires energy to occur)
720619
During the large scale manufacturing of drugs, a certain amount of drug will migrate into the solvent. By recovering the solvent and reprocessing, this drug can be sold and yields will increase. The advantage of this is higher capacity and less hazardous waste.
127488
Their difference in polarity and density are probably the two most likely properties to affect the rate of separation. Molecular weight differences between the two liquids would probably have some impact, also temperature would effect the rate of separation.
501359
yeaaaaah\n\nit's "expand and rise"\nthe energy (heat) supplied to it causes the individual molecules to have more energy and because of it, they expand further, and rise since density is lowered and volume is increased
653092
A 30% Acetic Acid solution has a density of 1.05 g/mL.  Water has a density of 1.0 g/mL.  So it is reasonable to assume that Acetic acid ("vinegar") is more dense than water, but the two are very, very close indeed.\n\nWhen you dissolve Acetic acid in water, the two mix to form a solution.  It is not easy to distill away the acetic acid from the water.\n\nJust because something is more/less dense than water does not necesarily mean it has a lower/higher boiling point.
258162
The smaller the particle size, the greater the surface area per volume of each particle, and therefore, the faster it dissolves in the solvent.\n\nBest wishes.
1039581
Which method of deaeration are you using?  It makes a big difference.  Definitely less than 0.1 mg/L.
706444
Density= Mass/Volume.  When water freezes, its volume increases. This is why a frozen bottle of water expands to the point of bursting. By the formula, if volume increases and Mass stays the same, then the value of density decreases.  Thus, this is why ice floats and is less dense than water.  When the ice melts, the reverse happens in that its volume decreases and again by the formula, density will increase.   Tahdaaaa!!
915662
1.  When you push down on a bicycle pump, you feel the pressure go up as the volume gets smaller.  If the volume gets smaller, the concentration of molecules per liter increases.  So you can easily observe there is a direct connection of pressure to change of concentrating.  Your experience with the bicycle pump or filling CO2 paintball tanks, or scuba tanks has made it obvious that you can achieve HUGE changes of pressure into a volume.  A little less obvious is the converse that you can have huge changes of volume from changes of pressure.  \nHowever, changing the pressure of a liquid makes very little change to its volume.  Hence, the concentration does not change with pressure.\n\n2.  Tiger is right that very many compounds will disolve readily in water and that is why people call in a universal solvent.  Inorganic salts have a great time in water, but not in organic solvents.  A really cool compound to look up is DMSO (Dimethylsulfoxide).  Because of the 2 methyl groups, it is an organic solvent.  However, the bond angle between those groups is very close to the bond angle between the 2 oxygens in water.  DMSO is a solvent for both organic AND inorganic compounds.\n\n3.  As mentioned in part 1, pressure and volume can change the concentration of a gas.  From the gas laws, you know that temperature is connected to changes in pressure.  So temperature as well as pressure will affect the solubility of gasses in liquids.\n\n4.  Raising the temperature.\n\n5.  CO2 is infinitely more soluble in air than it is in a soda.  Over time, the open glass of soda goes flat.  However, there are physical issues that affect the observation.  The larger bubbles tend to escape the sides of a glass and disappear into the air leaving the smaller ones behind.  When the glass is undisturbed and no new bubbles are being formed, the size of a bubble will decrease in relation to the concentration of CO2 (which is getting smaller as the soda goes flat).