The Basics of Hydrogen

  • Hydrogen by itself is not dangerous, but it becomes explosive whenever oxygen is present!  1
Hydrogen burns explosively!
Taken from Dangerous Labratories.
  • Many of us are familiar with Hydrogen as it is used to propel spacecraft.  2
Powering Rockets With Hydrogen
Taken from Google Images.
  • Comparing the reaction for burning Hydrogen as opposed to burning methane gives: 3
Hydrogen + Oxygen = Water
Burning Hydrogen with Oxygen produces water
Image taken from Utah State Office of Education
http://www.usoe.k12.ut.us/CURR/Science/sciber00/8th/matter/sciber/chemtype.htm


Energy Released in the combustion of 1.15g H2 = (11.3 kJ/ºC)(14.3ºC) = 162 kJ
Simplifying this value for 1g of H2 = 162 kJ / 1.5g = 141 kJ/g

verses:

Methane + Oxygen = Carbon Dioxide + Water
CH4 + 2O2 → CO2 + 2H2O
Image taken from Wikipedia
http://en.wikipedia.org/wiki/Methane


Energy Released in the combustion of 1.5g CH4 = (11.3 kJ/ºC)(7.3ºC) = 83 kJ
Simplifying this value for 1g of CH4 = 83 kJ / 1.5g = 55 kJ/g