Question

identifying physical and chemical changes
the list below includes some of the properties of ammonia. identify the physical properties in the list. check all of the boxes that apply.
☑️ gas at room temperature
☑️ strong, unpleasant odor
❌ reacts with hydrochloric acid
☑️ dissolves easily in water
❌ burns in oxygen
complete
the list below includes some of the properties of butane, a common fuel. identify the chemical properties in the list. check all of the boxes that apply.
☐ denser than water
☐ burns readily in air
☐ boiling point of -1.1°c
☐ odorless
☐ does not react with water
done

Explanation:

Physical properties are observable/measurable without changing a substance's chemical identity. Chemical properties describe a substance's ability to undergo chemical changes.

1. For butane:

• "Denser than water", "boiling point of -1.1°C", "odorless" are physical properties (observable without chemical change).
• "Burns readily in air" is a chemical property (involves a combustion reaction, changing butane's chemical identity).
• "Does not react with water" is a chemical property (describes a lack of chemical reaction, related to chemical behavior).

Answer:

• burns readily in air
• does not react with water