Question

breaking glass vs battery generating electricity—watch the animation and look at the before and after images. breaking glass battery generating electricity what do you notice about the particles? what do you notice about the particles? is this a physical or chemical change? is this a physical or chemical change? explain using evidence explain using evidence

Explanation:

Breaking Glass

What do you notice about the particles?

The particles of the glass (molecules/atoms) remain the same in identity; they just change in arrangement (break into smaller pieces). The chemical composition of the glass doesn't change at the particle level—only the physical structure (size and shape of the glass pieces) is altered.

Is this a physical or chemical change?

This is a physical change.

Explain using evidence

In a physical change, the substance's chemical identity remains unchanged, and no new substance is formed. When glass breaks, the particles (atoms/molecules) of the glass are still the same type of particles (e.g., silicon dioxide particles in typical glass). The change is only in the physical form (size and shape of the glass pieces), so it is a physical change.

Battery Generating Electricity

What do you notice about the particles?

Inside the battery, chemical reactions occur at the electrodes (anode and cathode). Particles (ions, atoms, or molecules) involved in the redox reactions (oxidation at the anode, reduction at the cathode) change their chemical identity. For example, in a simple battery, metal atoms at the anode may lose electrons and become metal ions (dissolving into the electrolyte), while ions in the electrolyte may gain electrons at the cathode and form new substances (e.g., metal plating or gas formation).

Is this a physical or chemical change?

This is a chemical change.

Explain using evidence

A chemical change involves the formation of new substances due to a change in the chemical identity of the particles. In a battery, the chemical reactions at the electrodes (e.g., oxidation of the anode material and reduction of ions in the electrolyte) produce new substances (e.g., metal ions, gases, or different metal compounds). The particles (atoms/ions) involved undergo changes in their chemical structure (e.g., electron transfer, bond breaking/forming), resulting in new substances. Thus, battery operation involves chemical changes.

Answer:

Breaking Glass

What do you notice about the particles?

The particles of the glass (molecules/atoms) remain the same in identity; they just change in arrangement (break into smaller pieces). The chemical composition of the glass doesn't change at the particle level—only the physical structure (size and shape of the glass pieces) is altered.

Is this a physical or chemical change?

This is a physical change.

Explain using evidence

In a physical change, the substance's chemical identity remains unchanged, and no new substance is formed. When glass breaks, the particles (atoms/molecules) of the glass are still the same type of particles (e.g., silicon dioxide particles in typical glass). The change is only in the physical form (size and shape of the glass pieces), so it is a physical change.

Battery Generating Electricity

What do you notice about the particles?

Inside the battery, chemical reactions occur at the electrodes (anode and cathode). Particles (ions, atoms, or molecules) involved in the redox reactions (oxidation at the anode, reduction at the cathode) change their chemical identity. For example, in a simple battery, metal atoms at the anode may lose electrons and become metal ions (dissolving into the electrolyte), while ions in the electrolyte may gain electrons at the cathode and form new substances (e.g., metal plating or gas formation).

Is this a physical or chemical change?

This is a chemical change.

Explain using evidence

A chemical change involves the formation of new substances due to a change in the chemical identity of the particles. In a battery, the chemical reactions at the electrodes (e.g., oxidation of the anode material and reduction of ions in the electrolyte) produce new substances (e.g., metal ions, gases, or different metal compounds). The particles (atoms/ions) involved undergo changes in their chemical structure (e.g., electron transfer, bond breaking/forming), resulting in new substances. Thus, battery operation involves chemical changes.