What question did this study set out to answer?

The aim is to develop an AC calorimetry method for measuring heat capacity and thermal properties under high pressure.

Qualitative AC calorimetry under high pressure using piston–cylinder apparatus without adiabatic approximation

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AC calorimetry measures heat capacity in cyclohexene and methylcyclohexane under high pressure, indicating new methods for thermal properties.

The aim is to develop an AC calorimetry method for measuring heat capacity and thermal properties under high pressure.
Developed an AC calorimetry method using a piston-cylinder apparatus
Measured heat capacity and thermal conductivity up to 2.1 GPa and down to ∼40 K
Used a planar one-dimensional heat conduction model with platinum resistors
Applied the method to liquid samples including NH4Cl, cyclohexene, and methylcyclohexane.
Successfully measured heat capacity for cyclohexene and methylcyclohexane
Provided a new approach for thermal property measurements in liquid samples under high pressure
Demonstrated the effectiveness of the method with a range of substances.

Ito et al. (2026) studied this question.

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AC calorimetry measures heat capacity in cyclohexene and methylcyclohexane under high pressure, indicating new methods for thermal properties.