Equation of State of Detonation Products and the Possible Phase Transition for CHBr3

The equilibrium compositions of the gas-solid mixture are calculated by minimizing the Gibbs free energy and chemical equilibrium. BKW and VLW equations are proposed for the EOS of detonation products and the detonation properties of explosive composed of C-H-N-O have been calculated. The results are agreed with experiment data excellent. Moreover, the equilibrium calculations are conducted on the dissociation of shock compressed liquid bromoform and our numerical results agree with reported shock-wave data. The analysis based on our numerical results suggests that at 55～60 GPa there occurs a continuous shock dissociation rather than a thermodynamic phase transition.