A Thermodynamic Process in an Insect the African bombardier beetle Stenaptinus insignis can emit a jet of defensive spray from the movable tip of its abdomen (Fig. 19.32). The beetle's body has reservoirs of two different chemicals; when the beetle is disturbed, these chemicals are combined in a reaction chamber, producing a compound that is warmed from 20oC to l00oC by the heat of reaction. The high pressure produced allows the compound to be sprayed out at speeds up to 19 m/s (68 km/h), scaring away predators of all kinds. (The beetle shown in the figure is 2 cm long.) Calculate the heat of reaction of the two chemicals (in J/kg). Assume that the specific heat capacity of the two chemicals and the spray is the same as that of water, 4.19 X 103 J/kg. K, and that the initial temperature of the chemicals is 20oC.