Enthalpy Density and TNT

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Mara Lockhart 3J
Posts: 53
Joined: Fri Sep 26, 2014 2:02 pm

Enthalpy Density and TNT

Postby Mara Lockhart 3J » Sat Jan 17, 2015 2:15 pm

For number 7.55, we are asked to find the enthalpy density of TNT. We first find the enthalpy of reaction, which comes out to be -13168 kj/mol. Why do we only use one fourth of this amount of energy for the amount that will be released per mole of TNT consumed?

Astred 1D
Posts: 15
Joined: Fri Sep 26, 2014 2:02 pm

Re: Enthalpy Density and TNT

Postby Astred 1D » Sat Jan 17, 2015 3:15 pm

Hi,

Are you asking about the 1/4 of TNT used in the conversion to enthalpy density (energy released per liter) for the reaction? If so, it is because there are for moles of TNT. You divide the value you got for enthalpy of the reaction by the for moles of TNT.

Hope this helps.

Mara Lockhart 3J
Posts: 53
Joined: Fri Sep 26, 2014 2:02 pm

Re: Enthalpy Density and TNT

Postby Mara Lockhart 3J » Sat Jan 17, 2015 3:23 pm

Thank you! This helps!!


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