A liquified petroleum gas (LPG) terminal has a capacity of 20000 m3. As a result of a leakage, 6000 kg propane is released and evaporated into the atmosphere.

(a) How much overpressure may one observe staying 300 m away from this facility using the equivalent TNT mass method? Please consider 2% of the energy released as shock wave and use the empirical formula taught in the class to calculate overpressure. Heat of combustion of propane, c : 46010 kJ/kg Heat of combustion of , : 4760 kJ/kg

(b) For the problem mentioned above, please draw an overpressure curve at an interval of 100m from 200 m to 1000 m and comment on the observed overpressure as a function of distance.