What’s on the Entropy poster
The rule, 3 worked examples, and the mistake everyone makes.
- Entropy is proportional to the logarithm of the number of accessible microstates.
- S = k ln W · ΔS = Q/T for a reversible change
- Gas expanding into a vacuum = More positions available, S increases
- Ice melting = More arrangements, S increases
- A tidy room = Far fewer arrangements than an untidy one
- Common mistake: Reading entropy as disorder → It counts accessible microstates
Entropy increases because high-entropy states are overwhelmingly more numerous, not because of any force pushing toward them.
Questions about the Entropy poster
- What’s on the Entropy (Thermodynamics) poster?
- The rule, 3 worked examples, and the mistake everyone makes. Entropy is proportional to the logarithm of the number of accessible microstates.; S = k ln W · ΔS = Q/T for a reversible change; Gas expanding into a vacuum = More positions available, S increases; Ice melting = More arrangements, S increases; A tidy room = Far fewer arrangements than an untidy one; Common mistake: Reading entropy as disorder → It counts accessible microstates. Entropy increases because high-entropy states are overwhelmingly more numerous, not because of any force pushing toward them.
- Who is the Entropy (Thermodynamics) poster for?
- Entropy (Thermodynamics) belongs to the Physics section rather than to a school year, because physical science is not something one grade owns. Anyone learning thermodynamics can pin it up — a beginner, a student mid-course, or someone revising years later.
- When should you use the Entropy (Thermodynamics) poster?
- Entropy counts the number of microstates. That is why it increases. A wall chart earns its place by being glanceable from where the work is happening, so Entropy (Thermodynamics) belongs on the wall where that physical science work actually happens, within glancing distance, rather than filed away.
- What other posters go with Entropy (Thermodynamics)?
- Energy Resources, The Gas Laws and Heat Engines sit alongside Entropy (Thermodynamics) in the Physics section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.Energy ResourcesThe Gas LawsHeat Engines
- Is the Entropy (Thermodynamics) poster free to download and print?
- Yes. Entropy (Thermodynamics) downloads as a free PDF with no account, no email and no watermark, like everything else in the Physics section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
- What size does the Entropy (Thermodynamics) poster print at?
- Entropy (Thermodynamics) is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Entropy (Thermodynamics) loses nothing.Printing guide
Related posters
Charts that sit alongside Entropy on the same wall.
Browse every Physics poster, or start from the full catalogue.