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Graphite is an example of a substance that has a high melting and boiling point and can conduct electricity. It has a layered structure that allows for the easy movement of electrons, which is why it can conduct electricity despite being a non-metal.
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How does boiling point and melting point find a substance?
The boiling point is the temperature at which a substance changes from a liquid to a gas, while the melting point is the temperature at which a substance changes from a solid to a liquid. These properties are unique to each substance and can be used to identify or characterize them.
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.
What substance has a melting point of 1074 K conducts electricity when dissolved in water but does not conduct electricity in the solid phase?
Sodium chloride fits this description. It has a melting point of 1074 K and conducts electricity when dissolved in water as it dissociates into sodium and chloride ions, but does not conduct electricity in the solid state because the ions are not free to move.
How do the melting and boiling point determine the purity of the substance and identify them?
The melting and boiling points of a substance are characteristic physical properties that can be used to assess purity. A pure substance will have a sharp melting or boiling point, occurring at a specific temperature range. Impurities tend to disrupt the orderly arrangement of particles in the substance, leading to a broader or lower melting/boiling point compared to the pure form. By comparing the experimental melting or boiling point of a sample to the literature values for the pure substance, one can determine the level of purity.
What is the meaning when something is boiling or melting?
Boiling occurs when a substance changes from a liquid to a gas at its boiling point, while melting happens when a substance changes from a solid to a liquid at its melting point. Both processes involve an increase in temperature that causes the substance's molecules to gain enough energy to overcome intermolecular forces and change states.
Is high melting point and boiling point a sign that a compound is ionic?
It's likely but not definitive. Giant covalent substances like diamond also have high melting and boiling points. To be sure you would have to show that the melted or dissolved substance conducts electricity.
Will there be effect on melting or boiling point of a substance if another substance is added to it?
Yes, impurities have important effects on the melting and boiling point of materials.
Are melting and boiling point physical properties of a substance?
Yes, melting and boiling points are physical properties of a substance. They represent specific temperatures at which a substance transitions from one phase to another - solid to liquid for melting point, and liquid to gas for boiling point.
How does boiling point and melting point find a substance?
The boiling point is the temperature at which a substance changes from a liquid to a gas, while the melting point is the temperature at which a substance changes from a solid to a liquid. These properties are unique to each substance and can be used to identify or characterize them.
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.
What is the boiling melting and freezing point?
A boiling point is a point on the temperature scale at which a substance begins to boil. A melting point is a point on the temperature scale at which a substance freezes. Melting and boiling points are unique to different types of elements.
How do the melting and boiling point determine the purity of the substance and identify them?
The melting and boiling points of a substance are characteristic physical properties that can be used to assess purity. A pure substance will have a sharp melting or boiling point, occurring at a specific temperature range. Impurities tend to disrupt the orderly arrangement of particles in the substance, leading to a broader or lower melting/boiling point compared to the pure form. By comparing the experimental melting or boiling point of a sample to the literature values for the pure substance, one can determine the level of purity.
What substance has a melting point of 1074 K conducts electricity when dissolved in water but does not conduct electricity in the solid phase?
Sodium chloride fits this description. It has a melting point of 1074 K and conducts electricity when dissolved in water as it dissociates into sodium and chloride ions, but does not conduct electricity in the solid state because the ions are not free to move.
What is the meaning when something is boiling or melting?
Boiling occurs when a substance changes from a liquid to a gas at its boiling point, while melting happens when a substance changes from a solid to a liquid at its melting point. Both processes involve an increase in temperature that causes the substance's molecules to gain enough energy to overcome intermolecular forces and change states.
What do boiling point and melting point have to do with the phase of matter of an element at room temperature?
The state of matter of a substance at room temperature depends on whether the melting and boiling points are above or below room temperature. At room temperature:A substance is solid if both the melting and boiling points are above room temperature.A substance is liquid if the melting point is below room temperature but the boiling point is above room temperature.A substance is a gas if both the melting point and boiling point are below room temperature.
What change of state occurs when a substance reaches it's melting point. What occurs when it reaches it's boiling point?
When a substance reaches its melting point, it changes from solid to liquid. When a substance reaches its boiling point, it changes from liquid to gas.
How can a substance have no melting point or boiling point?
Example: compounds that are thermally decomposed before a supposed melting or boiling point.
