Hydrogen Energy and the Greenhouse Effect Essay Example | Topics and Well Written Essays - 750 words

Hydrogen get-up-and-go and the Greenhouse Effect - Essay ExampleThe measurements showed that in the past half century, CO2 levels have been steady rising at an exponential rate (Weart). This is due to growing population and the quickly-developing technologies that inevitably demand more(prenominal) cipher, and, in the present, humanitys main microbe of energy is fossil fuels.As such, finding alternative energy extractions has stupefy a very important quest in the present. Among these alternative sources of energy is Hydrogen. Hydrogen is practically presented as one of the most promising alternatives for carbon-based fuels because it is the clean energy source that burns into wet vapor. It is also often pointed break that Hydrogen is the most abundant element in the universe and is very abundant on earth itself in the form of water. However, transposition to a Hydrogen powered economy isnt really as simple as it sounds. Although water is very abundant on Earth, it takes up a lot of energy to break it down into its hydrogen and oxygen voices and package it (Zyga). There is also the risk of hydrogen leaking out from the fuel cells which contain it (Warwick et. al.). Hydrogen energy would then basically cost more and be less(prenominal) economical than the current energy sources. However, if switching to Hydrogen as a major energy source would have good environmental impacts, then maybe it would be worth the cost.The product of Hydrogen burn as opposed to, say, gasoline combustion would only be water vapor whereas for gasoline combustion, the products would imply carbon dioxide which is considered to be the major cause of global warming. However, there are some who argue that water vapor, in fact, is the major greenhouse gas and is trusty for a larger portion of the greenhouse performance than carbon dioxide is. So, to find out whether hydrogen would really be a better energy source than carbon-based fuels, let us first look into the reactions invo lved in their combustion. For the carbon-based fuels, well just take octane, which is an important component of gasoline, as an example. The combustion reactions are as follows2 H2 + O2 2 H2O + 572 kJ(1)2 C8H18 + 25 O2 18 H2O + 16 CO2 + 11017.8 kJ (2)If we multiply equation (1) by 20, we get roughly the same sum of money of energy generated for the two reactions40 H2 + 20 O2 40 H2O + 11440 kJ (3)So, to produce the same amount of energy, 16 CO2 molecules and 18 H2O molecules would be produced for the octane combustion while 40 H2O molecules would be produced for the hydrogen combustion. If water vapor is a greenhouse gas just as CO2, then it my be that switching to hydrogen as an energy source would bring about an even worse greenhouse assemble than the CO2 produced by burning octane. However, there are a lot of things to be considered. Even though water vapor makes up 80% of all greenhouse gases in the atmosphere by mass, it is responsible only for 36% - 66% of the long wave absor ption done by all the greenhouse gases (Schmidt). By contrast, CO2 comprises only 1.44% of all the greenhouse gases by mass, yet it absorbs 9% - 26% of the amount long wave absorpt