The kiloton, which is used to measure the energy released in an atomic explosion, is equal to about 4.02 x 1012 J (approximately the energy released in the explosion of 1,000 tons of TNT). Recalling that 1 kilocalorie of energy raises the temperature of 1 kg of water by 1 oC and that 4,184 Joules is equal to 1 kilocalorie, then ---- x 108 kg of water initially at 1 oC can be heated up by 60 oC by a 49 kiloton atomic bomb.