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Delilah Naranjo dis 3j
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Joined: Wed Sep 21, 2016 3:00 pm


Postby Delilah Naranjo dis 3j » Sun Jan 29, 2017 10:07 pm

Hi does anyone know how to do question 65 from chapter 8? Its asks to calculate the standard enthalpy of formation of dinitrogen from the data given.

Mikaela Gareeb 3G
Posts: 31
Joined: Wed Sep 21, 2016 3:00 pm

Re: 8.65

Postby Mikaela Gareeb 3G » Mon Jan 30, 2017 9:39 am

First, you must create an equation in which the only product is N2O5 by manipulating the two given equations. Once you attain the standard enthalpy of the reaction for your new equation, solve for the standard enthalpy of formation for N2O5 by using the formula: DeltaH = 2DeltaH(N2O5) - 3DeltaH(O2)- 4DeltaH(NO).

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