2. Which statement describes the effect of adding more energy to a system, assuming a phase change does not occur?(1 point)
A. The particles within the system will have greater motion, and the temperature will decrease.
B. The particles within the system will have less motion, and the temperature will increase.
C. The particles within the system will have less motion, and the temperature will decrease.
D. The particles within the system will have greater motion, and the temperature will increase
3. Which statement correctly describes how attractions that hold particles break?(1 point)
A. Attractions occur due to gravitational forces. When particles have low enough energy, these forces can no longer keep particles together.
B. Attractions occur due to electrostatic forces. When particles have low enough energy, these forces can no longer keep particles together.
C. Attractions occur due to electrostatic forces. When particles move fast enough, these forces can no longer keep particles together.
D. Attractions occur due to gravitational forces. When particles move fast enough, these forces can no longer keep particles together.
4. Which statement explains why a rubber band analogy is not a perfect comparison for bonds in a substance when considering phase changes?(1 point)
A. For a phase change from solid to liquid, the bonds break completely and particles can move independently of each other.
B. For a phase change from solid to liquid, the bonds do not break completely and particles can still slide past each other.
C. For a phase change from liquid to gas, the bonds do not break completely and particles can still slide past each other.
D. For a phase change from liquid to gas, the bonds break completely and particles can move independently of each other.
5. The boiling point of benzene is 80ºC. Which pair of samples will have the same average kinetic energy as benzene molecules?(1 point)
A. a sample of liquid benzene at 70ºC and a sample of gaseous benzene at 90ºC
B. two samples of liquid benzene, one at 70ºC and the other at 80ºC
C. two samples of gaseous benzene, one at 80ºC and the other at 90ºC
D. a sample of liquid benzene at 80ºC and a sample of gaseous benzene at 80ºC
1. thermal energy
2. the particles within the system will handed greater motion, and the temp will increase.
3. attractions occur due to electrostatic forces. when particles move fast enough, these forces can no longer keep particles together.
4. for a phase change from a solid to liquid, the bonds do not break completely and particles call still slide past each other.
5. a sample of liquid benzene at 80°C and a sample of gaseous benzene at 80°C
post the damn answers
a+ connexus is 100% right
i think the answer to the first one is A, please tell me if i’m right or wrong thank you!
Thx a+!
2. To determine the effect of adding more energy to a system, we can consider the relationship between energy, particle motion, and temperature. When more energy is added to a system, the particles within the system will have greater motion and the temperature will increase. This is because the added energy increases the kinetic energy of the particles, causing them to move faster and collide more frequently, leading to an increase in temperature. Therefore, the correct answer is D: The particles within the system will have greater motion, and the temperature will increase.
3. To understand how attractions between particles break, we need to consider the type of forces involved in holding particles together. In general, attractions between particles are due to electrostatic forces, which include ionic, covalent, or metallic bonds. When particles have low enough energy, these electrostatic forces can no longer keep the particles together. Therefore, the correct answer is B: Attractions occur due to electrostatic forces. When particles have low enough energy, these forces can no longer keep particles together.
4. The rubber band analogy is often used to describe bonds in a substance because it helps visualize the concept of bonding and how it can change during phase transitions. However, the analogy is not perfect because it does not accurately represent the nature of bonding in certain phase changes. For example, during a phase change from solid to liquid, the bonds in the substance do not break completely, allowing particles to still slide past each other. Therefore, the correct answer is B: For a phase change from solid to liquid, the bonds do not break completely and particles can still slide past each other.
5. The average kinetic energy of molecules is directly related to the temperature of the substance. As temperature increases, the average kinetic energy of the molecules also increases. Therefore, to find samples with the same average kinetic energy as benzene molecules, we need to look for samples with the same temperature. In this case, the boiling point of benzene is 80ºC, so the samples with the same average kinetic energy as benzene molecules would be those at the same temperature. Therefore, the correct answer is D: a sample of liquid benzene at 80ºC and a sample of gaseous benzene at 80ºC.