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What phase is naphthalene at room temperature?
At room temperature, naphthalene is typically in a solid phase. It has a melting point of about 80 degrees Celsius (176 degrees Fahrenheit), so at temperatures below this, it remains solid. When heated above its melting point, naphthalene will transition into a liquid phase.
If a solid piece of naphthalene is heated and remains at 80C until it is completely melted you know that 80C is the?
If a solid piece of naphthalene is heated and remains at 80°C until it is completely melted, you know that 80°C is the melting point of naphthalene. At this temperature, the solid phase transitions to the liquid phase, absorbing heat without a change in temperature until the entire sample is melted. This characteristic behavior is typical for substances during phase changes, where energy input goes into overcoming intermolecular forces rather than increasing temperature.
Explain why naphthalene or moth balls disappear without wetting the clothes?
Naphthalene (moth balls) sublimes, which means it transitions from a solid to a gas without going through a liquid phase. This process occurs due to the substance's high vapor pressure at room temperature, causing it to evaporate directly into the air. As a result, naphthalene can disappear from clothes without leaving any visible residue.
Does naphthalene decompose when gently heated?
Yes, naphthalene sublimes and undergoes vaporization at temperatures above 80 degrees Celsius rather than decomposing directly. At temperatures exceeding its sublimation point, naphthalene converts from a solid to a gas without passing through a liquid phase.
How can we purified naphthalene by sublimation?
Naphthalene can be purified by sublimation due to its ability to transition directly from solid to gas without passing through a liquid phase. To perform the sublimation, heat the impure naphthalene in a controlled manner, allowing it to vaporize. The vapor then condenses on a cooler surface, typically a cold glass or metal surface, forming pure naphthalene crystals. This method effectively separates naphthalene from non-volatile impurities that do not sublimate.
What phase is naphthalene at room temperature?
At room temperature, naphthalene is typically in a solid phase. It has a melting point of about 80 degrees Celsius (176 degrees Fahrenheit), so at temperatures below this, it remains solid. When heated above its melting point, naphthalene will transition into a liquid phase.
What does a Graph of melting point and freezing point of naphthalene look like?
The graph of the melting point and freezing point of naphthalene would show a plateau at the melting point, as the solid naphthalene transitions into the liquid phase, and a plateau at the freezing point, as the liquid naphthalene transitions back into the solid phase. The melting point and freezing point of naphthalene are the same at approximately 80 degrees Celsius.
If a solid piece of naphthalene is heated and remains at 80C until it is completely melted you know that 80C is the?
If a solid piece of naphthalene is heated and remains at 80°C until it is completely melted, you know that 80°C is the melting point of naphthalene. At this temperature, the solid phase transitions to the liquid phase, absorbing heat without a change in temperature until the entire sample is melted. This characteristic behavior is typical for substances during phase changes, where energy input goes into overcoming intermolecular forces rather than increasing temperature.
What happens to naphthalene when it sublimes?
When naphthalene sublimes, it transitions directly from a solid to a gas phase without passing through a liquid phase. This process occurs when the substance is heated and the vapor pressure exceeds the atmospheric pressure. As the naphthalene molecules gain enough energy to break free from the solid phase, they transform into a gas.
How do naphthalene balls become smaller. name the process?
Naphthalene balls decrease in size due to sublimation, a process where the solid naphthalene directly transitions into a gas without passing through the liquid phase. This gradual transition causes the naphthalene balls to shrink over time.
Explain why naphthalene or moth balls disappear without wetting the clothes?
Naphthalene (moth balls) sublimes, which means it transitions from a solid to a gas without going through a liquid phase. This process occurs due to the substance's high vapor pressure at room temperature, causing it to evaporate directly into the air. As a result, naphthalene can disappear from clothes without leaving any visible residue.
Does naphthalene decompose when gently heated?
Yes, naphthalene sublimes and undergoes vaporization at temperatures above 80 degrees Celsius rather than decomposing directly. At temperatures exceeding its sublimation point, naphthalene converts from a solid to a gas without passing through a liquid phase.
How can we purified naphthalene by sublimation?
Naphthalene can be purified by sublimation due to its ability to transition directly from solid to gas without passing through a liquid phase. To perform the sublimation, heat the impure naphthalene in a controlled manner, allowing it to vaporize. The vapor then condenses on a cooler surface, typically a cold glass or metal surface, forming pure naphthalene crystals. This method effectively separates naphthalene from non-volatile impurities that do not sublimate.
If a solid piece of naphthalene is heated and remains at 80 degrees Celsius until it is completely melted you know that 80 degrees Celsius is?
80 degrees Celsius is the melting point of naphthalene. At this temperature, the solid naphthalene transitions to a liquid state, and the temperature remains constant during the phase change until all of the solid has melted. This characteristic indicates that the energy being added to the system is used for breaking intermolecular forces rather than increasing temperature.
What happens to the solid particles of naphthalene when heated?
When naphthalene is heated, the solid particles sublimate, meaning they change directly from a solid to a gas without passing through a liquid phase. This sublimation process causes the naphthalene to vaporize and release a characteristic odor.
Which physical method can be used to separate naphthalene from sand?
Sublimation can be used to separate naphthalene from sand. Naphthalene can be heated to change it directly from a solid to a gas, leaving the sand behind. The gas can then be collected and cooled to form solid naphthalene again.
How can you separate a mixture of naphthalene and ammonium chloride?
One way is to slurry the solid mixture with water. The ammonium chloride will dissolve and the naphthalene will not. Ammonium chloride can then be recovered by evaporating the water solution of it that is formed.
