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By irritating a solution, increasing the concentration of the solute, by increasing the temperature
Decreasing temperature would not increase the rate at which a solid dissolves
Increasing the pressure over a solid solute has virtually no effect on the rate that it dissolves. Stirring and increasing the temperature are the best methods for increasing the rate at which a solid solute dissolves.
The solvent molecules bump into the solid more often.
If the volume of the container is not fixed, increasing the temperature will cause a gas to expand (increase the volume), and contract when cooled (decreasing the volume). This would be the case for a gas inside a piston, or inside a rubber balloon. If the volume is fixed, then increasing the temperature will increase the pressure, and decreasing the temperature will decrease the pressure. This would be the case for a gas in a closed solid container, like a canister or sealed metal box. Increasing pressure will cause the gas to contract (reducing the volume), and decreasing the pressure will cause the gas to expand (increasing the volume). Again, this is if the volume is not fixed. If the volume is fixed, then increasing the pressure will increase the temperature, and decreasing the pressure will decrease the temperature. These concepts are all determined by something called the Ideal Gas Law. To find out more about how this works, see the Related Questions links below this answer. Gases can also be changed to a liquid or solid if the temperature is too low or the pressure is too high. As an example steam changes to a liquid when it touches a cold object, and nitrogen gas can be converted to liquid nitrogen by compressing it to very high pressures.
Ice
By irritating a solution, increasing the concentration of the solute, by increasing the temperature
solid heat
Decreasing the temperature a liquid become a solid.
Decreasing temperature would not increase the rate at which a solid dissolves
By decreasing the temperature of gas.
decreasing
Decreasing temperature would not increase the rate at which a solid dissolves
During the phase change of a solid to a liquid (melting), all of the energy goes into breaking the intermolecular bonds holding the molecules of the solid together, and none of the energy goes into changing the temperature. Thus, during this particular phase of melting, the temperature of the system does NOT change.
freezing temperature
it will increase or decrease depending on the states. from solid --> liquid or liquid --> gas it is positive and endothermic, and thermal energy is increasing from liquid --> solid or gas --> liquid it is negative and exothermic, and thermal energy is decreasing
SOLID LIQUID AND GAS These are the three state matter. All the materials we see in our daily lives (from ice-cream to chairs to water) are made up of matter. Matter can be classified into different states such as solid, liquid and gas on the basis of intermolecular forces and the arrangement of particles. These three forms of matter can be converted from one state of matter to another state by changing certain environmental factors (increasing or decreasing pressure and temperature, for instance). For example, Ice can be converted from a solid into liquid water by increasing the temperature.