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Why are the boiling and melting points of carbon dioxide the same?
Wiki User
∙ 11y ago
Because carbon dioxide is a gas.
Added:
At 1.0 bar, normal pressure, it sublimes (solid-gas phase change) at -78 °C, 194.7 K without passing through its liquid phase.
At 5.185 bar the boiling point (from liquid) is -57 °C, 216.6 K.
Wiki User
∙ 11y ago
Wiki User
∙ 11y agofreezing point is -78.5 degrees celsius and boiling point is -57 degrees celsius. But they are not at the same pressure.
Added:
At 1.0 bar, normal pressure, it sublimes (solid-gas phase change) at -78 °C, 194.7 K without passing through its liquid phase.
At 5.185 bar the boiling point (from liquid) is -57 °C, 216.6 K.
Wiki User
∙ 11y agoAt 1.0 bar, normal pressure, it sublimes (solid-gas phase change) at -78 °C, 194.7 K without passing through its liquid phase.
At 5.185 bar the boiling point (from liquid) is -57 °C, 216.6 K.
The picture of 'p,T-diagram of Carbon dioxide' is found in 'Related links' below this answer page
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Do all liquids have the same boiling and melting point?
No. The melting and boiling points of liquids vary considerably.
Hydrocarbon boiling points increase the number of carbon or decrease?
the boiling points decrease on hydrocarbons as the length of the chain and the weight increases. the melting points increase with length and weight increase. Hope this helps.
What is the melting and boiling points of magnesium and chloride?
chloride isn't a thing on its own and the melting and boiling points of chlorine and magnesium will have no effect on the boiling and melting point og magnesium chloride.
How melting and boiling points are affected by intermolecular forces?
The stronger the intermolecular forces, the higher the melting point and boiling point. The weaker the intermolecular forces, the lower the melting and boiling points are.
Do non polar covalent compounds have high or low melting points?
No they have high melting and boiling points. Don't get confused with simple molecular structures such as water and carbon dioxide which have simple covalent structures. When you heat them you are overcoming the forces BETWEEN THE MOLECULES (intermolecular/van der waals forces of attraction), NOT the actual covalent bonds themselves, like the bond betwen the C and either O in carbon dioxide.
Why are the melting and boiling points of air never given?
Air is a mixture; it doesn't have a melting or boiling point. It has a mixture of carbon dioxide, ozone, oxygen, nitrogen, helium, etc. look up those gases separately and you will get answers.
Do elements compounds and mixtures have fix melting and boiling point?
Yes, elements have fixed melting points; but some exceptions are with the elements having allotropes (as carbon, sulfur, phosphorous, etc.) - each allotrope has a specific melting point.
Do all liquids have the same boiling and melting point?
No. The melting and boiling points of liquids vary considerably.
How do you identify solids at melting or boiling points?
Melting and boiling points are different for each compound or element.
Does carbon dioxide or water have higher boiling points?
i don't know but don't you have a textbook or something
Do nonmetals have higher melting points or lower boiling points?
lower melting points
Hydrocarbon boiling points increase the number of carbon or decrease?
the boiling points decrease on hydrocarbons as the length of the chain and the weight increases. the melting points increase with length and weight increase. Hope this helps.
What is the melting and boiling points of magnesium and chloride?
chloride isn't a thing on its own and the melting and boiling points of chlorine and magnesium will have no effect on the boiling and melting point og magnesium chloride.
How melting and boiling points are affected by intermolecular forces?
The stronger the intermolecular forces, the higher the melting point and boiling point. The weaker the intermolecular forces, the lower the melting and boiling points are.
What is effect of decreasing pressure on solid carbon dioxide?
normal melting and boiling points are those when the pressure is 1 atmosphere, Solid CO2 gets converted to gaseous state (sublimation) on decrease of pressure to 1 atmosphere
Why might you expect silicon dioxide and carbon dioxide to have similar melting and boling points?
You Ultimately would not expect them to have similar melting and boiling points.This is because Carbon Dioxide is a gas, it might have strong covalent bonds between their atoms but between their molecules they have weak intermolecular forces, therefore these forces are easily overcome during heating in lower temperaturesHowever when you look at Silicon Dioxide, it has a macromolecular structure. In other words the whole solid is actually just one molecule which its atoms are each covalently bonded to each other. Therefore since it has strong covalent bonds between them you would expect them to have extremely high melting and boiling points.Diamond is a macromolecular structure and it has a melting point of 3006 degrees centigrade. You could expect Silicon Dioxide's melting point (and boiling point) to be similarly high.
Do non polar covalent compounds have high or low melting points?
No they have high melting and boiling points. Don't get confused with simple molecular structures such as water and carbon dioxide which have simple covalent structures. When you heat them you are overcoming the forces BETWEEN THE MOLECULES (intermolecular/van der waals forces of attraction), NOT the actual covalent bonds themselves, like the bond betwen the C and either O in carbon dioxide.
