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The combustion heat of hydrogeh (HHV) for 1 g is 141,8 kJ.

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Q: How much energy per gram of hydrogen is produced when hydrogen gas is being burned?
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How do Calcium Pyruvate supplements increase energy?

Calcium pyruvate increases your energy by boosting your metabolism. When your metabolism is boosted, fewer of your consumed starches and sugars are stored as fat as opposed to being burned off by your body. When more starch and sugar is burned off by your metabolism, your energy increases.


What are the conditions under which oxygen reacts with hydrogen to produce water. Oxygen supports combustion and hydrogen is a good fuel but water is a good extinguisher - why?

It is very good question indeed. Volume by volume two parts of hydrogen will burn in one part of oxygen.(Formula being 2H2 + O2 = H2O.) Mass for mass 212=4 to 16*2=32. 1 and 16 being mass number of hydrogen and oxygen. So 4 is to 32 means 1 is to 8 would be proportion mass by mass. After burning of hydrogen in oxygen, large amount of heat is produced and water is formed. To burn the hydrogen in oxygen you have to ignite the reaction in the form of spark, otherwise both of them will not burn and will remain as a mixture. Onceignitedthen further energy will be given by burning of gases. Now as water is already burn out product, it can not burn again. By burning wood, you get ash. You can not 'burn' the ash. So water is like 'ash' already burned out. And it consume lot of energy to get evaporated and easily available. So you use it to extinguish fire.


Which is more dangerous hydrocarbons or hydrogen fuel?

Dangerous in what way? hydrogen just being burned does not contribute to global warming, but what about 'making' the hydrogen? Does that use other fuels that contribute to global warming? Hydrogen is more explosive if that is what you mean by dangerous. Hydrocarbons burn to form carbon dioxide which contributes to global warming.

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How much of the energy is being produced with the clean energy and how much is being produced with the non clean energy?

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