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High‐Resolution Calorimetry: New Perspectives for the Study of Phase Transitions
Author(s) -
Nakagawa Yoshitzugu,
Schäfer Rolf
Publication year - 1999
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/(sici)1521-3773(19990419)38:8<1083::aid-anie1083>3.0.co;2-w
Subject(s) - calorimetry , phase transition , materials science , physics , thermodynamics
Only 7 pg of substance are needed to measure solid–solid phase transitions in n ‐alkanes with a new type of calorimeter (see schematic picture). This corresponds to a transition heat of only 500 pJ. The small time constant of the calorimeter additionally permits the observation of dynamic effects in the examined phase transitions.