Answer :
Final answer:
Josiah Willard Gibbs was an influential American scientist renowned for his pioneering work in physical chemistry.
Explanation:
Josiah Willard Gibbs (1839-1903) was a prominent American scientist known for his foundational work in the field of physical chemistry. He was the first to hold a professorship in mathematical physics in the United States and his research on the equilibrium of heterogeneous substances was groundbreaking in the 19th century.
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