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Postby 205154661_Dis2J » Sun Feb 09, 2020 11:32 pm

For Part B on 4D3, I was a little confused on why we would use 1.40g of carbon monoxide to calculate the internal energy (converting that into moles) instead of 1.00 mol CO(g) which was what was given on part b. I might be totally reading the question wrong, but can someone explain it?

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Re: 4D3

Postby Chem_Mod » Mon Feb 10, 2020 4:22 pm

In the problem, the temperature change is for 1.40 g of CO. Since the temperature change is proportional to the moles of CO you produce, when you do the calculations by converting 1.40g to moles, you end up getting the change in internal energy *per mole* of CO. delta U = -CdeltaT/n

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