Question

which statement accurately describes the energy of a block of ice? (1 point)
the potential energy of the ice is found in the vibration of the molecules.
the potential energy of the ice is found in the rapid motion of the molecules.
the kinetic energy of the ice is found in the rapid motion of the molecules.
the kinetic energy of the ice is found in the vibration of the molecules.

Explanation:

1. Recall the definitions of kinetic and potential energy in the context of molecular motion:

• Kinetic energy (KE) is related to the motion of particles. In solids (like ice), molecules vibrate in place rather than having rapid, free - moving motion (rapid motion is more characteristic of gases or liquids with higher thermal energy).
• Potential energy (PE) is related to the position or arrangement of particles (e.g., intermolecular forces), not their motion.

1. Analyze each option:

• Option 1: Potential energy is not related to molecular vibration (vibration is motion - related, so this is KE - related). So this is incorrect.
• Option 2: Potential energy is not related to molecular motion (rapid or otherwise). And ice molecules do not have rapid motion (they vibrate in place). So this is incorrect.
• Option 3: Ice is a solid, and its molecules do not have rapid motion (rapid motion is for substances with higher thermal energy like gases). So this is incorrect.
• Option 4: Kinetic energy of molecules in a solid (like ice) is due to their vibrational motion (since they can't move freely like in liquids or gases). So this statement is correct.

Answer:

The kinetic energy of the ice is found in the vibration of the molecules.