Why do things dissolve quicker in HOT water?
929239
because hot water has more energy than cold, giving the molecules more energy to move(melt)faster\n\n (i am trying to get to level 2 best answerer would help)
638255
Because water is polar and like dissolves like.
155966
yeah, it means the reaction reaches equilibrium faster
451840
Quite obviously faster. To boil over and turn to vapour, the water molecules near the surface need a lower amount of energy when the water is being boiled in a rarer atmosphere.
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.
1172152
good obervation!\n\nwell the reason is that when anything dissolves in something, that anything has it molecular bonds broken and interrupted by the solvent molecules. now to break the bonds of the solute(which dissolves) we need energy. this energy is provided by the solvent molecules. \n\nnow when anything is hot it has more energy associated with its molecules. hence hot milk has more energy too. so.....when it has more energy itself, it can provide the sugar molecules with more energy, hence its bonds can be broken faster, hence it dissolves faster.\n\nhope ur satisfied.
1007111
Water distributes heat much faster than air can, thus, if your are warmer, it will absorb your body heat.
115994
Salt occurs as (Na+Cl-) \nThe water molecules come between the atoms of salt , and thus breaks the ionic bonding b/w Na+ and Cl-.Na+ is attracted to the lone pair of oxygen atom of the water molecule and Cl-to the H atom of water molecule , thus hydrolysis and solvation of salt occurs, which makes the salt to dissolve fast whereas in sugars, the molecules are quite big and moreover sugar has a planar geometry , and contains bonds like -C-H, -C-OH-, -C-O-C-, these breaking of these bonds require more energy and moreover -C- is non-polar, thus increasing the no. of C atoms will make a compound to dissolve less in water. Sugar has 6 Carbon atoms.\nThus to dissolve sugar , we need stirring.
90779
c basically boiling of a liquid means the vapour pressure[pressure created at surface] equals the atmospheric pressure.the increase in vapour pressure is due to the fact that the kinetic energy of molecules movin thermal velocities because of increase in temp. therefore for some molecules the time taken by molecules to achieve this situation is faster as the molecules have diff forces of attraction .hence to break the forces and achieve the above situ. is diff for diff. liquids \n\n\nhope this is satisfactory any more queries  mail me
172854
Gasses are more soluble in liquids at lower temperatures.\nThis is why a soda will say carbonated longer in a cold refrigerator than out in the hot sun.  The carbon dioxide dissolved in the water will come out of solution quicker at higher temperature, the same thing for Oxygen.
474034
It decreases, as everyone said. The reason may be given like this: water at a given temperature is just a bunch of molecules wildly moving around. The temperature tells you just how fast. Evaporation (water drying up) happens because some of the fastest molecules escape into the surrounding air. Now, evaporation happens faster at higher altitude: that is because there is less air, the air molecules are less bunched together. This means a water molecule escaping into air is less likely to be bounced right back into the water. \n\nNow boiling occurs when evaporation is so violent that the water cannot hold itself together any more. Again, it will happen more easily in thin air, that is, at high altitudes.
947088
Pressure a higher pressure will push the molecules closer to each other so the reaction takes place faster cause the molecules colide more often.\n\nAmounts of the chemicals, will take longer as you increase each to fully react because there is more to react.\n\nConcentrations of the liquids a higher concentration will have more of the molecules to react.\n\nAnd the amount of activation energy if the amount is low the reaction will procede at a faster rate.
521004
The solubility of a gas in a liquid is inversely proportional to temperature.  As temp goes up solubility goes down.  This could be b/c the gas molecules have more K.E. and can break free from the liquid, they slam together to make bigger (visible) bubbles and float to the top b/c they're less dense, or b/c they expand when heated and rise to the surface easier.
45062
The hotter it is, the faster I think it will desolve. Hot liquids are moving at a faster rate, so the water molecules would be "bummping" into the aspirin more. This would cause it to disolve faster. Also, the hotter the liquid, the faster other things like sugar disolve.
429392
i'd say you have a basic understanding of molecular chemistry, micki.\n\nhowever, to improve your hypothesis, have it say:  I think the lower temperature the slower the salt will dissolve.  This is because the ions in a salt crystal require energy to dissolve away from the rigid crystal form the are in.  there is less energy present in cold water, therefore, the cold water will take longer to dissolve the salt crystals.
662532
Hot water will drop in temperature at a faster rate, but the cold water will freeze first except under certain circumstances in a phenomenon known as the Mpemba Effect\n\nhttp://math.ucr.edu/home/baez/physics/General/hot_water.html for more details on the phenomenon
739180
Warm water is absorbed easier into the body.  Cold water takes longer to absorb, therefore burning more calories.