This graph shows the phase change for water.
| D/
| /
| __C___/
|. /B
Temperature | _A__/
|/_____________________
Energy
Which statement best describes what is happening at portion C?
• The energy is increasing, and temperature is also increasing.
• The temperature is increasing, but the energy stays the same.
• Both Energy and temperature remain the same.
• The energy is increasing. but the temperature stays the same.
The statement "The temperature is increasing, but the energy stays the same" best describes what is happening at portion C.
Are you sure explain
Apologies for the confusion. Let me explain in more detail.
In portion C of the graph, the temperature is increasing, but the energy stays the same. This is known as a phase change, specifically the transition from a liquid state to a gas state (vaporization). During this phase change, the temperature of the substance remains constant even though energy is being added to it.
The energy that is added during this phase change is being used to break the intermolecular bonds between water molecules, allowing the water to transition from a liquid to a gas. Once all the water has completely vaporized, the energy will then begin to increase again with a rise in temperature.
So, in portion C, the temperature is increasing while the energy remains constant because the added energy is being used to break the intermolecular bonds and change the substance's phase from liquid to gas.