Thermal Energy Unit Test
2 of 102 of 10 Items
Question
Water boils at 100°C and turns into steam. Which similarities or differences are there between water at 100°C and steam at 100°C? (1 point)
Responses
The particles will have more space between them as a liquid, but they will be moving at the same speed in both states.
The particles will have more space between them as a liquid, but they will be moving at the same speed in both states.
The particles will have more space between them as a liquid, but they will be moving faster as steam.
The particles will have more space between them as a liquid, but they will be moving faster as steam.
The particles will have more space between them as steam, but they will be moving at the same speed in both states.
The particles will have more space between them as steam, but they will be moving at the same speed in both states.
The particles will have more space between them and will be moving at higher speeds as steam.
The correct answer is:
The particles will have more space between them and will be moving at higher speeds as steam.
An ice cube tray full of water is put into a freezer. Which energy change occurs in the particles in the water as it undergoes a phase change from a liquid to a solid?(1 point)
Responses
The potential energy increases due to the looser arrangement of the particles.
The potential energy increases due to the looser arrangement of the particles.
The potential energy decreases due to the looser arrangement of the particles.
The potential energy decreases due to the looser arrangement of the particles.
The potential energy increases due to the tighter arrangement of the particles.
The potential energy increases due to the tighter arrangement of the particles.
The potential energy decreases due to the tighter arrangement of the particles.
The correct answer is: The potential energy decreases due to the tighter arrangement of the particles.
An increase in thermal energy leads to _____(1 point)
Responses
an increase in heat and a decrease in kinetic energy until a phase change occurs.
an increase in heat and a decrease in kinetic energy until a phase change occurs.
a decrease in heat and a decrease in kinetic energy until a phase change occurs.
a decrease in heat and a decrease in kinetic energy until a phase change occurs.
a decrease in heat and an increase in kinetic energy until a phase change occurs.
a decrease in heat and an increase in kinetic energy until a phase change occurs.
an increase in heat and an increase in kinetic energy until a phase change occurs.
The correct answer is: an increase in heat and an increase in kinetic energy until a phase change occurs.
To determine the similarities or differences between water at 100°C and steam at 100°C, we need to understand the properties of matter in different states.
Water is a liquid at 100°C, and steam is a gas at the same temperature. When water boils and turns into steam, it undergoes a phase change from a liquid to a gas.
In the liquid state (water at 100°C), the particles (molecules) of water are closely packed together, but there is still some space between them. These particles are also moving, but they are not moving as freely as the particles in the gas state. Liquids have a relatively higher density compared to gases.
In the gas state (steam at 100°C), the particles have much more space between them. The particles move more freely and rapidly compared to the liquid state. This is because gases have lower density and their particles are less confined.
Therefore, the correct answer is: The particles will have more space between them as steam, but they will be moving at the same speed in both states.