Issue 29 gathers six books on physical chemistry and its applications to electrochemistry, aqueous equilibria, chemical kinetics, the solid state and the mining and metallurgical industries. A collection of this size and scope, combining advanced theory, teaching material and industrial practice, requires editorial leadership that is academically rigorous, strategically coherent and independent in its judgement. Within this framework, the roles of the Global Chief Editor and the

Honorary Chief Editor are complementary. The Global Chief Editor provides executive academic leadership and final editorial direction. The Honorary Chief Editor contributes senior scholarly counsel, prestige and an independent perspective, which is particularly valuable in this issue because two of the six books are co-authored by the Global Chief Editor.

Role of the Global Chief Editor (Professor Roberto Acevedo)

• Strategic editorial leadership. Defines the scholarly direction of Issue 29 and ensures that the six books are presented as a coherent collection, a progression from molecular foundations to industrial applications, rather than as unrelated titles.
• Final authority on academic quality. Oversees the standards of each book with respect to scientific accuracy, structure, clarity of exposition, consistency of notation and units, quality of worked examples, and presentation.
• Coordination of editorial processes. Manages the workflow from receipt of the manuscripts through preliminary screening, review, revision guidance and final approval, and supervises the preparation of the indexes and their pagination.
• Thematic organization of the issue. Assigns the titles to the Books section (Books 1–3) and the Education section (Books 4–6), sets their sequence, and ensures that the connections between them are visible to readers: statistical thermodynamics underpinning equilibria, electrochemistry and kinetics; and all three leading into mining and metallurgical practice.
• Ethics, integrity and scholarly responsibility. Safeguards academic integrity, responsible authorship and fair editorial judgement. Because he is co-author of Books 1 and 6, he declares this interest openly and refers the editorial assessment of those two titles to the Honorary Chief Editor, so that no author decides on his own work.
• International positioning and visibility. Projects the issue to a wider academic audience through the journal's website and ISSN registration, strengthens its institutional visibility, and promotes the use of these Spanish-language books in universities and in industry.

Role of the Honorary Chief Editor (Professor Rashmi Bhardwaj)

• Advisory academic guidance. Provides senior scholarly advice on the intellectual strength of the collection, particularly on the rigour of its mathematical and theoretical development: quantum models, statistical thermodynamics, equilibrium systems and kinetic and reactor equations.
• Independent assessment of co-authored titles. Acts as the independent editorial reference for Books 1 and 6, which are co-authored by the Global Chief Editor, so that their acceptance rests on an assessment free from any conflict of interest.
• Prestige and intellectual endorsement. Her association with the issue signals academic distinction and strengthens confidence in the seriousness of the editorial enterprise.
• Support for pedagogical and interdisciplinary coherence. Helps ensure that the collection keeps a sound balance between fundamental theory, problem solving and industrial application, and that it remains accessible to its intended readership.
• Mentorship and scholarly encouragement. Offers high-level feedback to authors and to the editorial team, encouraging the continued development of these books and of future contributions to the journal.
• International academic representation. Connects the issue with wider scholarly communities and research traditions beyond Chile, broadening its reach and its potential for collaboration.
• Values-based editorial presence. Reinforces the values the journal seeks to uphold: seriousness, reflection, inclusiveness and academic excellence.

Final Editorial Statement

The presence of both a Global Chief Editor and an Honorary Chief Editor is structurally important for Issue 29, not merely ceremonial. It brings together executive responsibility and independent scholarly counsel, which supports the credibility, coherence and integrity of a collection whose value depends on both its scientific rigour and its usefulness to students, lecturers and engineers.

In practical terms, Professor Roberto Acevedo provides the principal editorial direction and publication leadership of the issue, while Professor Rashmi Bhardwaj offers distinguished scholarly counsel, honorary intellectual support and the independent assessment that ensures fairness wherever the Global Chief Editor is also an author.