Qualitative Observations:
Quantitative
Observations:

Answer     Qualitative Observations: were you gather info using your senses EX:(listening, touching ect.

qantitative observations: is a collection fo data or useing statistical and numerical analysis methods.

In system A: A gas and a solid react to form a new solid product. the system entropy decreases.

In System B: Rubbing alcohol evaporates on the skin. liquid alcohol is converting to gas by evaporation so the system entropy increases.

Explanation:

Entropy  is a thermodynamic quantity measure the degree of disorder of a certain system.

Gases have larger entropy compared to liquids  which is larger than solids.

(A) When a gas convert to a solid, its entropy decreases. ... because solids have less energy and entropy than solids.

So, in system A: A gas and a solid react to form a new solid product. the system entropy decreases.

(B) Any chemical reaction that increases the number of gas molecules also increases entropy.

So, in System B: Rubbing alcohol evaporates on the skin. liquid alcohol is converting to gas by evaporation so the system entropy increases