(b) Describe the movement and arangement of parioles of substance 2 at \( 25^{\circ} \mathrm{C} \).

To describe the movement and arrangement of particles of a substance at \( 25^{\circ} \mathrm{C} \), we first need to identify the state of the substance (solid, liquid, or gas). However, since you referred to "substance 2" without specifying what it is, I will provide a general description for each state at that temperature. 1. **Solid State**: - **Arrangement**: Particles are closely packed in a fixed, orderly arrangement. They are held together by strong intermolecular forces, which maintain a definite shape and volume. - **Movement**: Particles vibrate in place but do not move freely. The vibrations are limited to their fixed positions within the lattice structure. 2. **Liquid State**: - **Arrangement**: Particles are still close together but not in a fixed arrangement. They are more loosely packed than in a solid, allowing them to slide past one another. - **Movement**: Particles have more kinetic energy than in a solid, allowing them to move around and flow. This results in a definite volume but no definite shape, as liquids take the shape of their container. 3. **Gas State**: - **Arrangement**: Particles are far apart and not arranged in any specific order. The distance between particles is much greater than in solids or liquids. - **Movement**: Particles have high kinetic energy and move freely and rapidly in all directions. This results in no definite shape or volume, as gases expand to fill their container. If you can specify what "substance 2" refers to, I can provide a more tailored description based on its state at \( 25^{\circ} \mathrm{C} \).