One calorie is the energy equivalent to one gram of TNT

1 cal - the amount of energy it takes to raise the temperature of 1 liter of water at 1 ° C and in other units is 4, 184 kJ or 1 16 Wh.

TNT equivalent - one more unit of energy, TNT - the most common explosive, so it is used as a universal unit of compute power of the explosion. By the way, trinitrotoluene (TNT) was invented in 1863 and was first used as a yellow dye.

TNT is inert enough: get him to detonate harder than most other explosives, besides it gives many of them in power, so as the explosive TNT for a long time was not popular.

If the power of the bomb is 1 m of TNT, which means that the explosion highlighted 4 184 GJ and TNT for 1 - about 4, 6 MJ. 1 Mt of TNT would be enough for three days to provide electricity to the United States, and for a house of this amount of energy is enough for 100 thousand years.

1 kg powder gives a blast capacity of 3 MJ, as much dynamite will release 7, 5 MJ of energy, and 1 kg of gasoline explode by 47, 2 MJ (equivalent to approximately 10 to 26 kg of TNT), however, this fuel requires an oxidizing agent.

If we imagine a small explosion of 1 g of TNT, then it is the amount of energy contained 1 cal, but the 1028 MT of TNT energy is enough to make a phenomenon equivalent of a supernova explosion.

via factroom.ru