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What temperature will a substance melt if the atmospheric pressure is 1.2?
Wiki User
∙ 14y ago
Leaving aside the obvious deficiencies in the question (1.2 WHAT? What substance?)... For most substances pressure has only a tiny effect on the melting point, and enormous pressures are required to change the melting point significantly (in contrast to boiling point, where pressure has a relatively much greater effect).
Wiki User
∙ 14y ago
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What is the melting temperature of a substance?
This is the definition of the melting point of an element or substance. The melting point is when a solid begins to turn into a liquid. A substance also has a boiling point and freezing point.
How does you test purity of substance?
Purity is measured by chemical analysis. The analysis should determine both what the substance is, and what impurities it contains. There are several analytical techniques available, depending on what you want to know. For organic compounds, the most common are infrared spectroscopy, mass spectrometry, and nuclear magnetic resonance spectroscopy. Other methods include titration and combustion analysis. A pure substance always has the same colour, taste or texture at a given temperature and pressure. Also it has a fixed melting point or boiling point at constant pressure. For example, pure water boils at 373K at 1 atmospheric pressure. But water containing some invisible dissolved substance boils at a temperature above 373K.
How does the energy required to sublime a substance compare to the energy required to melt the substance?
The energy required to sublime (solid to gas) a substance at 1 ATM pressure is greater than the energy required to melt (solid to liquid) a substance. When you compare the energies in varying pressures, however, this trend is not always the case. If you Google any 'general phase diagram', you can see that under the triple point, when all phases are in equilibrium, have solid and gas meeting under a certain pressure. In a vacuum, it would require less energy to sublime than to melt.
What is an atoms melting point?
An atom itself does not melt. The substance made out of atoms melts when it gets to hot in temperature, and the increased energy in the atoms causes the substance to fall apart somewhat.
Does ice not melt when kept in liquid ammonia?
Water ice would remain solid in liquid ammonia, because the temperature of the ammonia is well below 0 degrees Celsius, the melting point of ice. At normal atmospheric pressure, ammonia is liquid below minus 33.34 degrees C.
What natural driving force causes ice to melt spontaneously at room temperature?
Natural driving force causing ice to melt spontaneously at room temperature is the atmospheric pressure of nature.That and the fact that room temperature is well above freezing , one can put all the pressure one wants on ice , but until it rises above 0 deg. C , it will not melt. So temperature is the main factor , not pressure.
What is pressure vapour?
Vapour pressure is the pressure of the steam of a substance at a certain temperature. This does not automatically mean that the substance is completely evaporated. When the vapour pressure reaches the surrounding (atmospheric) pressure, the substance starts to boil or sublimate. Also at very low temperatures, even when the substance is in solid state, a certain amount of substance already exists as vapour. Though, for the most substances, the proportion of vapour is very small compared to the solid portion. Finally, a substance does not have to melt before it evaporates. This is called sublimation and occurs, e.g., when solid carbon dioxide (dry ice) is used: It will evaporate directly from the solid state (under normal ambient physical conditions), because, with rising temperature, the vapour pressure is already exceeding the atmospheric pressure before the melting point is reached. For details, have a look at the provided link.
Why does temperature effect the physical state of matter?
a low temperature will freeze the substance, a high temperature will melt or turn the substance into vapor
What substance melts at a lower temperature?
The substance with the lowest known melting temperature is the noble gas helium. Helium will not freeze at atmospheric pressures, but will freeze at about 1K (-272oC) when pressure is increased to 2.5 MPa (about 25 times atmospheric pressure). Due to helium's small atomic mass, and relative insucceptibility to dispersion forces, it is unlikely that there is a substance with a lower melting temperature.
How do you distinguish a pure substance?
A pure substance will melt over a very narrowtemperature range.An impure substance will melt over a broader, lower temperature range.
Why an ice cube will melt if compressed even if though the temperature remains the same?
ice (frozen water) is a tricky material. It melts at 0 degrees C under normal conditions, but if you exceed a pressure of 100 times atmospheric pressure its melting point lowers a few degrees, causing it to melt faster even though temperature is unchanged.
Is Venus life sustaining?
No, it has temperatures that can melt led and an atmospheric pressure 90 times that of Earth.
What will happen if you heat a solid substance?
if you heat a solid substance it will melt at certain degree of temperature according to the substance.
Does ice melt faster when atmospheric pressure is high?
In theory, yes, but it would be to insignificant to ever notice.
What kind of substance is a melting point?
what the heck are you asking? the melting point is not a substance. it's a temperature in which the substance starts to melt
What factors determine how quickly things melt?
Temperature and Pressure
What is the melting temperature of a substance?
This is the definition of the melting point of an element or substance. The melting point is when a solid begins to turn into a liquid. A substance also has a boiling point and freezing point.
