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What do the terms ''boiling point'' and freezing point mean?
In physics, "boiling" and "freezing" points generally refer to the temperatre and pressure at which liquid water becomes a gas (the "boiling point"), or when liquid water becomes a soild (the "freezing" point). This can be extended to other compounds as well, although the terms "boiling" and "freezing" are not necessarily used. More correctly, we should describe phase transition points, the temperature and pressure where any compound undergoes a change from one state of matter (eg, solid --> liquid, or liquid --> gas, or gas --> plasma).
Why does water evaporate more easily at the boiling point than at the freezing point?
Because it is closer to its enthalpy of vaporization (ΔvH), at boiling point the liquid molecules have highest kinetic energy so they easily escape from liquid as vapours.
What is the effect of decreased pressure on boiling point and freezing point of water?
Decreased pressure lowers the boiling point of water because it reduces the pressure exerted on the liquid, allowing the water molecules to escape into the vapor phase more easily. However, decreased pressure has a less significant effect on the freezing point of water compared to the boiling point, as freezing point is more influenced by the presence of impurities in the water.
If more than one phase of water is present what does it tell you about the temperature?
The temperature will be either the boiling point (if liquid and vapor is present) or it will be the melting/freezing point (if liquid and ice is present)
Is the boiling point of something the same as the melting point?
The boiling point is the temperature at which the vapor pressure of the liquid is equal to the external pressure. It is also the condensation point. The freezing point is the temperature at which liquid and solid coexist in equilibrium. It is also the melting point.
Does adding more solute to a solvent raise its freezing point lower its boiling point raise its boiling point or does not affect its boiling point?
Adding more solute to a solvent raises its boiling point and lowers its freezing point. This is known as boiling point elevation and freezing point depression. The presence of solute particles disrupts the organization of solvent molecules, making it more difficult for them to change phase.
How is boiling point related to frozen point?
The boiling point and freezing points are simply the temperatures at which a substance changes states from liquid to vapor (boiling) or liquid to solid (freezing). We are going to use water as an example. It is accomplished by adding (boiling) or removing (freezing) sufficient energy in the form of heat to cause a phase change. At 212F (100C) (boiling point) water is at its boiling point. To complete the transition you must add more energy to cause the phase change (the temperature will not change only the water will turn to steam). The heat required to cause the change is called latent heat. It works the same way for freezing except you must remove the latent heat and it happens at 32F (0C).
On the basis of its boiling point identify the pure liquid as either ethyl acetate or butyl acetate?
To identify a substance, you must find more than its boiling point. Also look for its freezing point and density.
What are some changes in matter?
States of matter are generally described as solid, liquid and gas (although there are more to think about when you really get into science). As such a change in matter is seen to be a change in state; from solid to liquid (melting), from liquid to gas (boiling), from solid to gas (sublimation), from gas to liquid (condensation) and liquid to solid (freezing).Interestingly each chemical has a unique melting/freezing point and boiling/condensation point. We can use those temperatures to help us identify unknown substances.
What process by which a solid changes to a liquid is called?
The process by which a solid changes to a liquid is called melting. It occurs when the solid absorbs enough heat energy to overcome the forces holding its particles together in a solid state, allowing them to move more freely and transition into a liquid state.
What is the boiling of of kelvin?
The boiling point is 100 more than the freezing point or 373. Pretty funny!
Does evaporation or boiling occur more quickly?
Boiling occurs more quickly than evaporation. Boiling is the rapid vaporization of a liquid when it is heated to its boiling point, whereas evaporation is the slower process of a liquid turning into a gas at temperatures below its boiling point.
