AP Chemistry Flashcards: Energy Diagrams
Written by AP Content Team, Verified for 2026 AP Exams, Last updated: May 2026
Review key ideas with interactive flashcards. This set includes 10 cards to help you master important concepts.
What two fundamental energy characteristics of a process are shown by an energy diagram?
An energy diagram shows the endothermic (energy absorbing) or exothermic (energy releasing) nature of a physical or chemical process.
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What two fundamental energy characteristics of a process are shown by an energy diagram?
An energy diagram shows the endothermic (energy absorbing) or exothermic (energy releasing) nature of a physical or chemical process.
To illustrate that ice melting requires an input of energy, what kind of diagram would you use?
You would use an energy diagram to represent this physical transformation, which would show the endothermic nature of the process.
If a process is known to be exothermic, what would its energy diagram show?
The energy diagram would represent the chemical or physical transformation and clearly show the exothermic nature of that process.
Does an energy diagram only apply to chemical reactions?
No, a physical or chemical process can be described with an energy diagram.
What is the key descriptive function of an energy diagram regarding energy change?
Its key descriptive function is to show the endothermic or exothermic nature of a given chemical or physical process.
What is an energy diagram?
It is a diagram used to represent a chemical or physical process and describe its endothermic or exothermic nature.
How does an energy diagram relate a transformation to its energy flow?
The diagram provides a visual representation of the transformation itself while simultaneously showing its inherent endothermic or exothermic nature.
What types of transformations can be described with an energy diagram?
Both a chemical transformation and a physical transformation can be described with an energy diagram.
A student wants to visually compare the energy change of boiling water versus burning methane. What tool should be used?
An energy diagram should be used, as it can represent both a physical transformation (boiling) and a chemical transformation (burning).
What is the primary purpose of an energy diagram?
An energy diagram is used to represent a chemical or physical transformation and show the endothermic or exothermic nature of that process.