Practice Question The diagram shows the changes in state of water (H2O). What is the process X called?
A. Melting
B. Boiling
C. Freezing
D. Freezing
Therefore, the Correct Answer is A.
More Questions on TEAS 7
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Q #1: In a phase diagram, which of the following term is used for a substance held at a temperature and pressure where solid, liquid, and gaseous states of a substance exist simultaneously?
A. Critical temperature
B. Triple point
C. Critical point
D. Absolute zero
Answer Explanation
phase diagrams are used to indicate physical states, a substance exist in specific conditions of pressure and temperature. Besides, phase diagrams provide information on pressure dependence of the phase-transition temperatures such as melting, sublimation, and boiling points. The figure below shows a typical phase diagram.
From the above diagram, the point where a substance exists in three states i.e solid, gas, and liquid is known as the triple point.
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Q #2: When the temperature of a liquid is increased a little, what happens to its particles?
A. They move so far apart that the liquid becomes a gas.
B. They start vibrating more.
C. They stop vibrating.
D. They come closer together.
Answer Explanation
As the temperature increase, the liquid turns into a gas. This process is known as vaporization, and in gaseous state the particles become far apart and move in random motion. The change is visually presented below
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Q #3: Practice Question The diagram shows the changes in state of water (H2O). What is the process X called?
A. Melting
B. Boiling
C. Freezing
D. Freezing
Answer Explanation
