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Why does the temp of water not increase during a phase change?
During a phase change, the energy that is added or removed from the water is used to change the arrangement of water molecules rather than increase the temperature. This energy is used to break or form intermolecular bonds between the molecules, leading to a change in state (solid, liquid, gas) rather than a change in temperature.
How does the addition of heat to a liquid affect its average kinetic energy?
Adding heat to a liquid increases the average kinetic energy of its molecules. This increase in kinetic energy causes the molecules to move faster, leading to higher temperature and possibly phase change from liquid to gas if enough heat is added.
Phase changes are not associated with a change in?
Phase changes, such as melting or freezing, are not associated with a change in temperature. Instead, the energy associated with phase changes is used to break or form intermolecular forces between molecules.
When does a substance donot change its temperature even if it is heated?
During a phase change, a substance will remain at a constant temperature while it is being heated. In the case of melting ice, the heat initially goes into separating water molecules from the ice lattice, which is melting. During that time, the heat goes into continued melting of the ice and the temperature remains constant. Once all of the ice is melted, adding additional heat will increase the temperature of the now liquid water.
Does the temperature of a substance changes before the change of state is completed?
No. During a phase change the temperature is constant until the phase change is complete.
What phase change involves an increase in the attractive force between molecules?
The phase change that involves an increase in the attractive force between molecules is called condensation.
Why does the temp of water not increase during a phase change?
During a phase change, the energy that is added or removed from the water is used to change the arrangement of water molecules rather than increase the temperature. This energy is used to break or form intermolecular bonds between the molecules, leading to a change in state (solid, liquid, gas) rather than a change in temperature.
How does the vapor pressure of a substance change with temperature?
The vapor pressure of a substance increases with temperature. As the temperature rises, more molecules have enough energy to escape from the liquid phase and enter the gas phase, leading to an increase in vapor pressure.
During which phase change does the average distance between molecules always increase?
During the phase change from a liquid to a gas, the average distance between molecules always increases.
What rule can you state about the relationship between phase changes and temperature?
As the temperature increases, the phases change from having the slowest amount of molecules to having the fastest amount of molecules (solid-liquid-gas)
Does the teperature drop or rise when a solid turns into a gas?
During the phase change, the temperature remains constant. Once the phase change is complete, the temperature will increase.
Could a phase graph with little temperature increase and a lot of heat be the same as latent heat?
Yes. Strictly speaking there should be no temperature change during a phase change.
What happens when a object gains thermal energy?
When an object gains thermal energy, its molecules start to move faster, leading to an increase in temperature. This increase in temperature can cause the object to expand, change phase (from solid to liquid, for example), or even break down if the thermal energy input is too high.
What A steep slope on a phase-change graph indicates?
Different
Why does temperature no change during energy phase change?
During a phase change, the heat transferred to a substance is used to break intermolecular forces (latent heat), and thus the temperature of the substance does not change. The opposite also occurs: heat is transferred from a substance during a phase change without a decrease in temperature as intermolecular bonds form.
Why doesn't the temperature increase as the liquid change into a gas?
Heat is being used to drive the change of phase, so until all the liquid has become gas (no more phase change is happening) the temperature cannot rise.
Why doesn't the temperature increase as the liquid changes into a gas?
During phase change from liquid to gas, the energy is used to break the intermolecular forces holding the liquid together rather than increase the temperature. This energy is called latent heat and is used to overcome the forces between molecules instead of raising the temperature. Once all the liquid has evaporated, then additional energy will go towards increasing the temperature of the gas.
