Part A: What happens to temperature as naphthalene melts?
Objective: As heat is applied to liquid naphthalene, the temperature rises. As the temperature rises, the naphthalene will eventually start to melt. This lab experiment tries to answer the question: what happens to the temperature of naphthalene as it melts? In this lab, you will heat the liquid naphthalene, and record the temperature changes. You will graph the temperature changes before drawing any conclusions.
Part B: Determining the freezing point of naphthaleneObjective: Freezing point is a characteristic property of matter. As heat is taken away from a liquid, the temperature of that liquid decreases as the substance begins to freeze. This lab experiment tries to answer the question: what is the freezing point of an unknown liquid (naphthalene)? In this lab, you will cool liquid naphthalene, and record the temperature changes. You will graph the temperature changes before drawing any conclusions.No, the temperature remains constant during melting as energy is used to break intermolecular bonds rather than increase the temperature.
During a change of state, such as melting or boiling, the temperature generally remains constant. The energy added or removed during the phase change is used to break or form intermolecular forces, rather than changing the kinetic energy of the particles to alter temperature. Once the change of state is complete, the temperature will then either increase or decrease again depending on whether heat is added or removed.
During melting, the temperature remains constant because the heat energy being absorbed by the substance is being used to break the bonds between the molecules rather than increase the kinetic energy of the molecules. Once all the bonds are broken and the substance changes phase completely, the temperature will start to rise again.
During melting and boiling, the energy being added to the substance is used to break the intermolecular forces holding the molecules together, rather than increasing the kinetic energy of the molecules. This means that the temperature remains constant because the energy is absorbed as the substance undergoes a phase change.
You can withdraw heat from something without lowering its temperature during a phase change, such as during melting or boiling. As the substance absorbs energy to undergo a change in state, its temperature remains constant until the phase change is complete.
During melting the temperature remain constant if it was achieved the melting point.
Naphthalene, which is found in mothballs, when heated sublimes (which means it changes from a solid directly into a gaseous state without going through the liquid state).
The intermolecular forces of attraction in the solid decreases as it is heated and the solid melts (solid converts to liquid) at its melting point.
During melting, the water in the beaker absorbs heat and undergoes a phase change from solid (ice) to liquid. As it melts, the temperature remains constant until all the ice has transformed into water.
If the annealing temperature is too high during the process, it can lead to the material becoming too soft or even melting, which can affect the desired properties of the material.
Stirring the naphthalene continuously during cooling helps to promote even heat distribution and prevent the formation of hot spots. This ensures that the naphthalene cools uniformly, reducing the risk of crystallization issues and improving the overall quality of the solid product.
Temperature of melting iceis a constant property: it does not change during melting (stays 0oC, this is even one of the the defined value of the Celsius temperature scale)(for any other melting solid the same is valid at each melting point temperature)
No, the temperature remains constant during melting as energy is used to break intermolecular bonds rather than increase the temperature.
yes it is. Its melting so its becoming a liquid
No. The temperature does not change during the melting process. All of the heat energy is used to break the bonds of the solid to form a liquid, i.e. the energy is used in the phase change, and thus is not used to raise the temperature.
you must have observed during the experiment of melting that the temperature of the system does not change after the melting point is reached till all the ice melts this happens even though we continue to heat the breaker that is we continue to supply heat
A change in temperature occurs during both freezing and melting. Freezing and melting are physical changes since the chemical contents of the matter do not change.