What happens to the amount of molecular motion in water when its temp. is increased?
613190
it speeds up until it boils and then remains constant
279658
Ice floats on water because it is less dense than water, meaning it has fewer molecules per volume. This is because of the Hydrogen bonds. In fact, while other substances contract when solidified, water expands. That's why it's less dense, and not because it has air inside. Furthermore, when the temperature decreases and reaches 4 degrees Celsius, every water molecule is Hydrogen-bonded to 4 other molecules near it. Then, they form into a crystal lattice structure, and it holds them further apart.
854162
I assume you mean how does that work.\n\nMost liquids expand when heated and contract when cooled. The alcohol in thermometer will expand (rise) when heated and contract (fall) when cooled.
559672
The corect answer is 1) - Its molecules speed up.\nmany times the temperature also rises but not always.\nThink of when you heat ice up. At some point the ice turns to water but does not heat up until all the ice is converted.\n\nI hope you are doing your own homework, not using yahoo as a crutch.
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.
71275
Heat is the kinetic energy of molecular motion. The molecules of a hot object are in rapid motion; the hotter, the higher the average speed and the greater the thermal energy. If the object is gaseous the motion consists of free-path travel and collisions with other molecules. If it is liquid the paths between collisions are shorter, and if solid the motion is vibrational with no secular movement.
1117920
It will be water at 100 degrees that will stay that temperature longer b/c of the increased volume.  The only way to increase the temp is to increase the energy (temperature) while keeping the same mass (like putting flame under the container of water).  Since you are increasing mass AND energy, it balances out.
955519
The density of a solid or liquid is determined by the various kinds of intermolecular bonds, see the reference.  These bonds tend to attract a molecule to its neighbors.  The molecules tend to keep getting closer until the electrostatic repulsion between the positively charged nuclei equals the attraction.\n\nAs you increase the temperature, nothing changes within a molecule, the molecules just move more.  In a solid, they generally stay in place and vibrate with respect to their neighbors.  The repulsive force is inverse square with distance, so as molecules get closer, the repulsive force increases rapidly.  Thus, the vibrations involve more movement away from the neighbors than toward the neighbors.  That's why the average distance between molecules increases with temperature.\n\nRarely, other factors dominate.  As water cools, it contracts until it reaches about 39 degrees F, and then starts expanding.
966113
Water molecules are constantly moving.\n\nWhen water warms up, they move faster and when it boils they move even faster.\n\nWhen water cools down they move slower and when it freezes, they stick together and slow down a whole lot.\n\nHowever, even when water is frozen, the molecules still move around, just much slower than we can observe.\n\nThis is true for all molecules.  At temperature absolute zero, all molecular and atomic movement would theoretically stop.  This temperature has never been achieved.\n\nPS - water molecules tend to be attracted to each other, which is why they stick together when they freeze.  when you pour some water on a table, it will stay together in a "puddle" because the water molecules are attracted to each other.
378824
Temperature affects state change. If something, for instance water, is heated, it becomes a gas. Gases take up more volume than liquids. So the hotter a gas is, the larger it will expand, and the same is true, to a lesser degree, for solids and liquids. Hope I helped,\nZ
279818
Temperature DOES affect the amount of salt that can be dissolved in a liquid.  Generally the higher the temperature, the more solute can be dissolved
86483
Actually, Gonpatrick, the original question is quite correct: Unlike most substances, water does actually expand when it is cooled, over a narrow temperature range from about 4 degrees C to 0 degrees C (the freezing point.)  This is why water freezes from the top down: the cooler water that is closer to freezing is less dense than, and so floats above, slightly warmer water.  (Above 4 degrees C, water expands when it is heated just like most other substances.) When the water freezes it expands some more, which is why ice floats.\n\nThe reason why it does this has to do with the way water molecules are put together.  The two hydrogens and one oxygen in H2O are assembled in a triangular pattern, with one part of the molecule more positive and the other more negative.  Above 4 degrees C, the molecules move freely around each other, but when it gets close to its freezing temp, the molecules start to align themselves with the positive part of one molecule near the negative part of another, ultimately forming, when it freezes, a hexagonal pattern.  This arrangement takes up more room than when the molecules are free to move around.
904003
Temperature rise of water = 2 deg C = 275 K\nq=mc(change in temperature)\n  = (100)(4.18)(275)\n  =114950J\n  = 114.95 kJ\nHmm. Either I'm wrong or the question is incomplete. Did the question perhaps give more information on the reaction?
1106588
Normally at 0ºC or 32ºF.  At that point water just begins to crystalize.\n\nThere are cases when water will not freeze, like \n- freezing point depression due to hydration,\n- freezing point depression due to osmotic effects (these are both equilibrium effects),\n- supercooling: the delay or absence of formation of an ice crystal in the absence of efficient ice nucleators and/or\n- the high viscosity\n\nFor every 0.5ºC (1ºF), water's viscosity will change by about 1.5%.\n\nWater viscosity is inversely related to temperature. The lower temperature, the higher viscosity.\n\nBut, water's dynamic viscosity at 0ºC is 3.732µ [ 10-5 (lb.s/ft2)] and the kinematic viscosity is 1.924v [10-5 (ft2/s)].
908583
No, it does not.  However, the arrangement of the molecules does.  When the temperature is high, the molecules become very energetic and take the form of a gas as they move rapidly around and bounce off each other.  When the temperature drops sufficiently, the molecules take on a lattice structure because they are moving too slowly to resist intermolecular forces.
1012439
Heat will make molecules expand.  Expanded molecules will take up more room and will affect the volume.  A hot liquid will take up more volume, especially in small containers, like pipettes.  It will give you a false measurement.\n\nFor accurate results, the glassware is calibrated with liquids at the specified temperatures.
178651
Your question is not clear but I take it you want 2 know what happens when heat is applied to a chemical reaction. \n\nHeat increases kinetic energy in molecules. If you apply heat, bombardment of molecules increase and therefore the reaction is favoured. In terms of equilibrium in reversible reactions, the forward reaction is favoured.