The graph shows a phase change diagram.
What phase change is taking place as energy is lost at segment BA?
A.
melting
B.
freezing
C.
sublimation
D.
condensation
B. freezing
The correct answer is B. freezing.
During segment BA, energy is being lost, which typically corresponds to a decrease in temperature. In the phase change diagram, the process of freezing occurs when a substance changes from its liquid phase to its solid phase due to the removal of heat energy. Therefore, the phase change taking place as energy is lost at segment BA is freezing.
To determine the phase change taking place as energy is lost at segment BA, we need to analyze the options and understand the phase change diagram.
In a phase change diagram, the x-axis represents temperature, and the y-axis represents energy. The diagram typically consists of multiple segments that represent different phase changes.
To find the phase change at segment BA, we need to look at the relationship between energy and temperature.
If energy is being lost, it means that the object is releasing or transferring heat, which causes the temperature to decrease.
Now let's analyze the options:
A. Melting: Melting is the phase change from a solid to a liquid. It occurs when energy is added to a solid, causing it to melt and become a liquid. Since energy is being lost at segment BA, melting is not the correct answer.
B. Freezing: Freezing is the phase change from a liquid to a solid. It occurs when energy is removed from a liquid, causing it to freeze and become a solid. Since energy is being lost at segment BA, this is the correct answer.
C. Sublimation: Sublimation is the phase change from a solid directly to a gas, skipping the liquid phase. It occurs when energy is added to a solid, causing it to change into a gas. Since energy is being lost at segment BA, sublimation is not the correct answer.
D. Condensation: Condensation is the phase change from a gas to a liquid. It occurs when energy is removed from a gas, causing it to condense and become a liquid. Since energy is being lost at segment BA, condensation is not the correct answer.
Therefore, the correct answer is B. Freezing, as energy is being lost and the phase change is from a liquid to a solid.