Question 4D9

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Tyler Angtuaco 1G
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Joined: Wed Sep 11, 2019 12:16 am

Question 4D9

Postby Tyler Angtuaco 1G » Fri Feb 07, 2020 7:48 pm

The enthalpy of reaction is -13168 kJ per mole. The solutions manual divides this value by four (using stoichiometric ratios) to put this in terms of TNT, whose enthalpy density is what we are trying to find. If we are just using stoichiometric ratios to find this value in terms of TNT, why do we convert this value to +3292 rather than keeping it as -3292?

Ariel Davydov 1C
Posts: 110
Joined: Thu Jul 11, 2019 12:16 am
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Re: Question 4D9

Postby Ariel Davydov 1C » Sat Feb 08, 2020 12:31 pm

Since we are calculating the enthalpy density solely for the combustion of TNT, it will be a positive value because it is only in terms of the energy absorbed in breaking the bonds of TNT, rather than the overall reaction as a whole.

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