Free Alternatives to Atkins' Physical Chemistry
Atkins' Physical Chemistry is one of the most widely assigned textbooks in undergraduate chemistry, and new editions regularly run well over $150. The core subject — thermodynamics, quantum chemistry, kinetics, spectroscopy — is standard enough that several free, rigorous alternatives cover the same ground.
Free full courses and texts
Physical Chemistry (OpenStax / LibreTexts collections)
by Multiple contributing authors
LibreTexts hosts an actively maintained, free, peer-reviewed physical chemistry textbook collection covering thermodynamics, quantum mechanics, and kinetics at the same depth as standard commercial texts.
5.61 Physical Chemistry (MIT OpenCourseWare)
by MIT Department of Chemistry
Full lecture notes, problem sets, and exams from MIT's undergraduate physical chemistry sequence, free and complete.
Filling in specific topics
- •Thermodynamics: search for free thermodynamics texts from MIT OCW or LibreTexts — the derivations match what Atkins covers chapter-for-chapter.
- •Quantum chemistry: MIT's 5.61 and 5.73 courses cover this in more mathematical depth than most undergraduate texts, useful if Atkins feels too brief.
- •Spectroscopy: search open-access spectroscopy course notes from any research university chemistry department — these are commonly published openly since the content changes little year to year.
Physical chemistry problem sets are where courses actually differ most — pair a free textbook for concepts with your assigned course's specific problem sets rather than trying to match both exactly.
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