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For any pure substance the boiling point and melting point will always remain?
Wiki User
∙ 12y ago
The melting point and the boiling point of a substance are physical characteristics for each substance and are unchanged at the same pressure.
Wiki User
∙ 12y ago
Wiki User
∙ 7y agoThey will remain dependent on the pressure.
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Why does the temperature of a substance remain constant during it's melting point on boiling point?
Because of phase transition ie from solid to liquid during melting and from liquid to vapour during boiling. So just to change over from one phase to the other heat is totally utilized and hence no chance to have a rise in temperature. So temperature remains constant.
What can be said of a boiling point of a liquid?
At the boiling point a liquid is transformed in a gas; it is a change of phase, a physical process.
Is freezing point of a substance is equal the melting point of the same substance?
The freezing point and the melting point both refer to the temperature at which a substance changes between a liquid and a solid state. If other conditions remain the same, the temperature at which a substance freezes is the same temperature at which it melts. Water is an every day example with a freezing point of 0C, the same temperature as it will begin to melt. Other substances such as metals have significantly higher melting points from around 200C to more than 3000C.
What is Chlorine's boiling point and melting point?
(It has a melting point of-150.7 degrees Fahrenheit and a boiling of -29.27 degrees Fahrenheit.) Chlorine Melting point is 172 Kelvin (which is also its freezing point) Chlorine's boiling point is 239 Kelvin (which is also its condensing point) For reference, water freezes at 273 Kelvin and boils at 373 Kelvin. This means that chlorine will remain a gas until quite cold temperature of about negative 34 degrees centigrade. Those numbers above are valid under atmosphere pressure 14.7 PSI As soon as pressure changes, especially when Cl2 is being transferred through piping, boiling point ( condensing point) will also go higher. For example; Cl2 is in gas form at 25 PSI if temperature is 24F (-4C , or 268K ) If you increase the pressure in your pipe up to 65 PSI for transferring to further points then CL2 gas condenses (liquiifies) in the pipe. Reason is condensing temperature at 65 PSI is 54F (12C , or 285K)
Why would a plume of solid silicate rock rising slowly from deep in the mantle begin melting as it neared the base of the lithosphere?
Temperatures remain high as lowered pressures decrease melting temperatures.
Is a sharp melting point for a crystalline organic substance always indicates a pure single compound?
Nope; not always. So the answer would be false. You have to realize that there might be impure substances mixed. Likewise impure substance can either lower the melting point or increase it :)M. Bilal :)
Describe what a pure material or substance is?
These are substances that contain only one type of atoms/molecules. For example, diamond is a pure substance. Diamonds are made of strictly carbon atoms. Melting points and Boiling points of pure substances always remain constant !
Why do impurities lower the boiling point of a pure substance?
The presence of the impurities will cause the boiling points to rise (also the melting points to fall). When you add the impurities, the substance doesn't remain pure affecting the boiling point to increase because now, more energy is required to boil the liquid with impurities. The melting points fall because impure substances require less energy to separate the particles.
Is boiling temperature a characteristic property?
Yes, boiling point is a characteristic property of matter. It is called a characteristic property because no matter how much of a pure substance you have, the boiling point should remain the same. Therefore, it is a characteristic property of pure substances.
Is the boiling point of a substance a physicsl property?
No, the boiling point is a physical property because the compound or substance is not changing chemically (only physically from a liquid to a gas). The boiling point is considered the temperature at which the vapor pressure of the liquid equals the atmospheric pressure surrounding the liquid. All of these are physical properties, making the boiling point a physical property too.
Is the melting and boiling point physical?
The melting and boiling points of a material are physical properties of that material.Melting is a solid becoming a liquid, and boiling is a liquid becoming a gas. These are changes between the three different phases a substance can be in (solid, liquid, and gas*). Both of these changes can occur through the application of varying amounts of heat** . All substances can go through these stages. When a substance changes stages, they remain the same substance, so the change is a physical change.*a fourth, controversial stage is plasma, which is an electrically charged substance.**A liquid can also become a gas by extreme low pressure.
Why does the temperature of a substance remain constant during it's melting point on boiling point?
Because of phase transition ie from solid to liquid during melting and from liquid to vapour during boiling. So just to change over from one phase to the other heat is totally utilized and hence no chance to have a rise in temperature. So temperature remains constant.
Explain why the boiling point and the melting point can be used to help identify substances?
100 degrees mate. 100 degrees Celsius is the boiling point for pure water at 1atm or sea level. The boiling point is useful in identifying chemical compounds. Chemical compounds have different boiling points that are specific to it' s chemical composition. If you know what the boiling point or melting point is you can also tell if your compound is pure, as any impurities will change these.
Why the freezing point of liquid is same as melting point of solid?
The freezing point and melting point of a substance are both defined as the temperature at which liquid and solid phases of the substance can remain together at equilibrium.
Is melting point a intensive or extencive property?
Melting point is an intensive property. Regardless of the amount of a substance present the melting point will remain the same.
Is the following sentence grammatically correct -'Energy of a substance which always remain stationary'?
It is not a sentence. There is no main verb.
Why does temperature remain constant during melting and boiling?
because of phase transtion i.e. from solid to liquid during melting and from liquid to vapour during boiling. so just to change over from one phase to the other heat is totally utilized.
