What’s on the Gibbs Free Energy poster
The rule, 3 worked examples, and the mistake everyone makes.
- A reaction is thermodynamically feasible when the Gibbs free energy change is negative.
- ΔG = ΔH − TΔS
- ΔH negative, ΔS positive = Always feasible
- ΔH positive, ΔS negative = Never feasible
- ΔH positive, ΔS positive = Feasible at high T
- Common mistake: Reading feasible as 'will happen' → Feasible means thermodynamically…
ΔS must be in J K⁻¹ mol⁻¹ and ΔH in kJ mol⁻¹ — divide ΔS by 1000 before substituting. It is the commonest error.
Questions about the Gibbs Free Energy poster
- What’s on the Gibbs Free Energy poster?
- The rule, 3 worked examples, and the mistake everyone makes. A reaction is thermodynamically feasible when the Gibbs free energy change is negative.; ΔG = ΔH − TΔS; ΔH negative, ΔS positive = Always feasible; ΔH positive, ΔS negative = Never feasible; ΔH positive, ΔS positive = Feasible at high T; Common mistake: Reading feasible as 'will happen' → Feasible means thermodynamically…. ΔS must be in J K⁻¹ mol⁻¹ and ΔH in kJ mol⁻¹ — divide ΔS by 1000 before substituting. It is the commonest error.
- Who is the Gibbs Free Energy poster for?
- Gibbs Free Energy belongs to the Chemistry section rather than to a school year, because physical science is not something one grade owns. Anyone learning physical chemistry can pin it up — a beginner, a student mid-course, or someone revising years later.
- When should you use the Gibbs Free Energy poster?
- Negative ΔG means feasible. Temperature can flip the sign. A wall chart earns its place by being glanceable from where the work is happening, so Gibbs Free Energy belongs on the wall where that physical science work actually happens, within glancing distance, rather than filed away.
- What other posters go with Gibbs Free Energy?
- Born-Haber Cycles, Equilibrium and Electrode Potentials sit alongside Gibbs Free Energy in the Chemistry section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.Born-Haber CyclesEquilibriumElectrode Potentials
- Is the Gibbs Free Energy poster free to download and print?
- Yes. Gibbs Free Energy downloads as a free PDF with no account, no email and no watermark, like everything else in the Chemistry 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 Gibbs Free Energy poster print at?
- Gibbs Free Energy 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 Gibbs Free Energy loses nothing.Printing guide
Related posters
Charts that sit alongside Gibbs Free Energy on the same wall.
Browse every Chemistry poster, or start from the full catalogue.