Question detail
What is the definition of enthalpy change under constant pressure?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Energetics
Question
- A. The heat content of a system at constant volume
- B. The heat content of a system at constant pressure
- C. The change in temperature of a system
- D. The energy required to break bonds in a reaction
Answer
The heat content of a system at constant pressure
Explanation
Enthalpy change is defined as the heat content of a system at constant pressure, reflecting the energy changes during a chemical reaction.
Common mistake
Misunderstanding Enthalpy Change Definition
Students often confuse enthalpy change with heat transfer, failing to recognize that enthalpy change is defined under constant pressure and is a measure of the total energy change in a system during a reaction.
To correctly define enthalpy change, remember that it represents the heat content of a system at constant pressure. Use the formula ΔH = q_p, where ΔH is the enthalpy change and q_p is the heat transferred at constant pressure. Ensure to clarify that this definition applies specifically under constant pressure conditions.
Related flashcards
Flashcard 1 of 5
Related practice questions
Question 1 of 5
Choose an answer, get feedback, then move sideways through the set.