# High pressure effects on the benzene pre-crystallization metastable states

## TL;DR

This study investigates how high pressure influences the metastable states of benzene during phase transition, revealing that increased pressure reduces supercooling and transition times, culminating in the end of metastability at 2200 atm and 356 K.

## Contribution

The paper provides experimental data and quadratic models describing the pressure dependence of benzene's metastable phase parameters up to 2200 atm.

## Key findings

- Supercooling and transition times decrease with pressure.
- Metastability ends at 2200 atm and 356 K.
- Densities and heat capacities of supercooled benzene are calculated.

## Abstract

We report new results on the liquid to solid phase transition of benzene. We determine experimentally and investigate the properties of a number of parameters of the benzene metastable state under different pressures (from 0.1 up to 2200 atm). It is shown that the supercooling, pressure drop, incubation period, time of abrupt transition from the metastable state to the crystalline state, and time of isothermal freezing all decrease as the external pressure increases, then they all vanish at 2200 atm and 356 K which may mark the end-point of metastability. Quadratic interpolation formulas for these parameters are provided. The densities and molar heat capacities of supercooled benzene under different pressures have been calculated too.