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17 January, 09:31

The elements nitrogen and oxygen are diatomic gases in their standard states. Therefore, the standard enthalpies of formation of these elements are zero. When nitrogen and oxygen gases react to form one mile of NO2, the enthalpy of the reaction is also zero. True or false?

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  1. 17 January, 11:01
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    This is false because the O=O and N≡N bonds must still use up energy to break apart, but a different amount of energy will be released with the formation of the O=N-O bonds.
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