Industrial accidents involving explosion of steam boilers can happen due to many factors. The work that a pressurised fluid would do if allowed to expand adiabatically to the state of the surroundings can be viewed as the explosive energy of the pressurised fluid. Because of the very short time period of the explosion and the apparent stability afterward, the explosion process can be considered to be adiabatic with no changes in KE and PE. The closed-system conservation of energy relation in this case reduces to Wout = m(U1 U2). Then the explosive energy becomes Eexp = m(U1 uz) where subscripts 1 and 2 refer to the state of the fluid before and after the explosion, respectively. = = 3 (a) Determine the explosive energy of 20 m of steam at 10 MPa and 500C assuming the steam condenses and becomes a liquid at 25C after the explosion. If the explosive energy of TNT is 3,250 kJ/kg, this explosion is equivalent to how many kg of TNT? (b) (Ans (a) 1,793,436 kJ, (b) 551.8 kg)