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6th edition 9.65

Posted: Mon Feb 25, 2019 12:37 am
by Karyn Nguyen 1K
Which of the following compounds become less stable with respect to the elements as the temperature is raised: (a) PCl5(g); (b) HCN(g); (c) NO(g); (d) SO2(g)?

How do we know which substances to use when writing the balanced equation? For instance, in (b) why do we use C(s), graphite instead of C(g) or C(s), diamond?

Re: 6th edition 9.65

Posted: Mon Feb 25, 2019 8:53 am
by Reva Kakaria 1J
I think they probably want us to use the elements in their most stable form, which for carbon is C (s), graphite.

Re: 6th edition 9.65

Posted: Mon Feb 25, 2019 10:41 am
by Karyn Nguyen 1K
Just to make sure, the most stable form is the substance that has a delta G formation that is less positive right?