Question detail
Describe how the particle model can explain the apparent mass changes when a gas is a reactant in a chemical reaction.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations
Question
Describe how the particle model can explain the apparent mass changes when a gas is a reactant in a chemical reaction.
Answer
According to the particle model, gases consist of particles that are in constant motion and occupy a large volume. When a gas is a reactant, it may escape into the air during the reaction, resulting in fewer particles in the reaction mixture and an apparent decrease in mass.
Explanation
This question evaluates the student's ability to apply the particle model to explain mass changes in reactions. It encourages them to integrate their knowledge of particle behavior with chemical reactions involving gases.
Common mistake
Misunderstanding Mass Change
Students often think that mass is lost when a gas escapes during a reaction, rather than understanding that the total mass remains constant.
To fix this, students should remember that the law of conservation of mass states that no atoms are lost or created, and they should consider the mass of the gas that escapes as part of the total mass of the system. Keep the correction anchored to Mass changes when a reactant or product is a gas; check formula, substitution, calculation, final answer, and unit where relevant.
Related flashcards
Flashcard 1 of 5
Related practice questions
Question 1 of 5
Choose an answer, get feedback, then move sideways through the set.