posted by Nathan on .
A mixture of hydrogen gas and oxygen gas are ignited and the following reaction occurs: Hydrogen + Oxygen = Water + Energy. Is this an Endothermic or Exothermic reaction and why?
If it burns, doesn't it give off heat?
I'm not sure it burns. that's my problem. I would assume it burns because it is being ignited. But the question that will be on the test tomorrow is "2 students ignight a mizture of hydrogen gas and oxygen gas in a test tube. The following reaction occurs: Hydrogen + Oxygen = Water + Energy. Is the reaction that occurs endo or exothermic and why?"