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Why can boiling points and freezing points be used to identify substance?
It's because substances have different boiling point and freezing point. By finding the exact boiling point and freezing point, you can identify a substance. Keep in mind that a material's melting point is the same as its freezing point. These are just different terms for the same thing, it just depends on whether energy is being removed from a substance (freezing) or if energy is being added to a substance (melting). The same thing also applies to the boiling/condensation point.
The freezing point and boiling point for matter is a constant Explain this meaning of constant?
It means that the freezing or melting points do not change, that they are always the same, depending on the type of matter. For eg. the melting point or freezing point of water is 0○ Celsius and the boiling point is always 100○C.
Are melting and boiling points of a substance the same?
The melting and boiling points of a substance (in this case I am assuming you are referring to a pure substance, and not a mixture), are the same. The triple point is defined by the temperature and pressure at which solid, liquid, and vapor of a substance, can coexist in equilibrium. At any pressure below the triple point, only sublimation and condensation are possible (no liquid phase is possible). Between the triple point pressure and the critical point pressure, there is a difference between the melting and boiling points, of a substance. The melting point temperature will be lower than the boiling point. At the critical point, the densities of the liquid and vapor phases, have merged, and boiling no longer occurs. At and above the critical point, you cease to get liquid and vapor, but you get what is referred to as a "supercritical fluid".
If a substance forms crystals when it solidifies its melting and freezing points are the same?
Melting and freezing points are identical.
How is the melting point of a substance related to its freezing point?
The melting point of a substance is when a substance turns from a solid to a liquid, and the freezing point is when a substance turns froma liquid to a sold. This of water, t he freezing point, when it turns to a solid (ice) is 0 degrees C. Hope that helps!
Why is melting and freezing point of a substance same?
"Melting" and "freezing" are transition actions, going from solid-to-liquid form and liquid-to-solid form respectively. The point is the same transition temperature of that particular substance. The same goes for the transition temperature of the "boiling point" and "condensation point" of a substance.
How can the melting and boiling point help you identify it?
Melting and boiling points are physical properties unique to each substance, so knowing these values can help identify a substance. By comparing the observed melting and boiling points of an unknown substance to known values in a database, you can narrow down the possible identities of the substance. Substances with similar melting and boiling points are more likely to be the same compound.
Is the boiling point of a pure substance the same as an impure substance and why?
Adding impurities changes both boiling points and freezing points. The added material has its own chemical interactions with the solvent to which it is added. In order to boil, a substance must overcome the chemical attraction between its own constituent atoms or molecules. If there are also other atoms or molecules to which a constituent atom or molecule of a given substance is also attracted, the boiling point will therefore be higher. No it's not the same it dip pends on what the substance is.
How can the boiling point of water be raised or lowered?
because the boiling and freezing points can be from two different substances so one could be frozen at 0 degrees and the other boiling
How do celsius and Fahrenheit express freezing and boiling points of water differently?
Not sure that they are different necessarily, just different scales. The freezing and boiling points of water are the same no matter which scale is used. In degrees, the Celsius scale measures the temp at 0 degrees for freezing and 100 degrees for boiling. Farenheit scales measures the freezing point at 32 degrees and the boiling point at 212 degrees.
How are melting and freezing points similar in a chemical?
Melting and freezing points are both physical properties of a substance related to its phase change from solid to liquid (melting) or liquid to solid (freezing) at a specific temperature. These points are the same temperature for a pure substance under constant pressure and can be used to identify and characterize substances.
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.
