4D.9

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Gabriella Bates 2L
Posts: 113
Joined: Thu Jul 11, 2019 12:15 am

4D.9

Postby Gabriella Bates 2L » Mon Feb 03, 2020 11:44 pm

In the solution for 4D.9, the enthalpy density (enthalpy change per liter) of the reaction of TNT and oxygen is positive. However, delta H for the reaction is negative. Why is the enthalpy density positive but delta H is negative? Thanks in advance

Skyllar Kuppinger 1F
Posts: 52
Joined: Thu Jul 25, 2019 12:16 am

Re: 4D.9

Postby Skyllar Kuppinger 1F » Tue Feb 04, 2020 10:13 pm

That is just a convention thing. Enthalpy densities are always written as positive because a density cannot be a negative value.


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