Arithmetic in 11.19c






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Lucia H 2L
Posts: 43
Joined: Mon Nov 14, 2016 3:00 am
Been upvoted: 1 time

Arithmetic in 11.19c

Postby Lucia H 2L » Sat Feb 10, 2018 2:17 pm

Can someone please show the math they did in 11.19c?

Calculate k for CaCO3(s) --> CaO(s) + CO2(g) at 25 degrees C

k = 1x10^-23 but my calculator keeps rounding to zero and I want to see if I did it right.

Thanks.

Andres Reynoso 1J
Posts: 30
Joined: Fri Sep 29, 2017 7:06 am

Re: Arithmetic in 11.19c

Postby Andres Reynoso 1J » Sat Feb 10, 2018 7:36 pm

http://i1380.photobucket.com/albums/ah165/andresreynoso/chemcomm_zps6ilqogyd.jpg
Hopefully this helps!

*Edit: Photobucket doesn't allow third party hosting, so I just submitted the direct link.
Last edited by Andres Reynoso 1J on Sat Feb 24, 2018 8:50 pm, edited 2 times in total.

Adrian Lim 1G
Posts: 88
Joined: Fri Sep 29, 2017 7:03 am

Re: Arithmetic in 11.19c

Postby Adrian Lim 1G » Mon Feb 12, 2018 1:53 am

delta G = (-604.03 - 392.36) + 1128.8 = 130.41 kj/mol
lnk = - 130410/(8.314*298.15) = -52.61
k = e^(-52.61)
k = 1.419 * 10^-23
k = 1 * 10^-23
Hopefully this helps!


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