4D.21

Moderators: Chem_Mod, Chem_Admin

Angela Wu-2H
Posts: 50
Joined: Fri Aug 30, 2019 12:16 am

4D.21

Postby Angela Wu-2H » Sun Feb 09, 2020 6:36 pm

For 4D.21, I have the exact numbers and equation correct according to the book, but my final answer was different from the book answer manual. The book says the correct answer is "-138.18 kJ" but I got -709.84 kJ.

Am I making a minor calculation mistake based on how I put it into the calculator? Is anyone else getting this error?

Brittney Hun 2C
Posts: 104
Joined: Wed Sep 11, 2019 12:15 am

Re: 4D.21

Postby Brittney Hun 2C » Sun Feb 09, 2020 7:19 pm

I'm getting -138.13 so it might just be a calculation error!

Isabella Dal Porto 1H
Posts: 100
Joined: Fri Aug 30, 2019 12:16 am

Re: 4D.21

Postby Isabella Dal Porto 1H » Sun Feb 09, 2020 7:23 pm

I got -138.18 kJ like the solution manual. You probably have a small calculation error. Are all the signs correct and did you multiply each one by the correct number of moles?

Justin Vayakone 1C
Posts: 110
Joined: Sat Sep 07, 2019 12:19 am

Re: 4D.21

Postby Justin Vayakone 1C » Sun Feb 09, 2020 7:25 pm

Also getting -138.18, so probably inputting into the calculator wrong.


Return to “Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)”

Who is online

Users browsing this forum: No registered users and 1 guest