40 煤氣爆炸?

煤氣，其主要組成為氫氣，當有一定數量未燃點之煤氣排出，就隨時有可能與空氣中之氧氣結合，這個結合程序需要明火助燃，一般可令氣體鵬脹數以十倍計，因此火箭就可利用這原理，送火箭出太空。
一般煤氣爆炸，藍色火焰其實不多，同時燃燒時間亦極短，所以因此而燒傷之機會不大。其主要破壞是由氣體鵬脹造成之衝突波，可以將人拋飛幾十尺，像被一部汽車撞飛。電影一般要好看，吸引觀眾，所以在煤氣爆炸場面上都要加一些助燃劑，以產生燈色巨大之火焰。

THis question should be asked in the chemistry category. You need a mixture of 煤氣 and oxygen. And the exact best performing ratio I do not know. Before we move on, first you have to know what is a 爆炸. 爆炸 is a process of combustion. But because the combusted gases have higher pressure than the pressure around us, therefore te gases tend to expand in a very fast rate. This expansion leads to an explosion. Bam!!!

To have the biggest explosion, you need to have a bigger difference in pressures (pressure of the gases and the pressure around us), more 煤氣(in this case) and more oxygen of a best performing ratio and a complete combustion between the 煤氣 and oxygen.

To have a bigger difference in pressures, you can either do the 爆炸 in a vacuum area or fill a container with 煤氣. The container actually adds pressure after the combustion because the energy from the 煤氣 can release at the same moment. To have a complete combustion, you need to make sure the oxygen and 煤氣 are mixed evenly and all of the oxygen and 煤氣 must be used up.