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Hannah Lee 2F
Posts: 117
Joined: Thu Jul 11, 2019 12:15 am


Postby Hannah Lee 2F » Tue Jan 28, 2020 8:24 pm

For 4D.9:

Why is the answer given as a positive instead of negative value? I thought that since the reaction is exothermic and the enthalpy of rxn is negative, the enthalpy density would also be negative?
Screen Shot 2020-01-28 at 8.22.30 PM.png

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

Re: 4D.9

Postby Justin Vayakone 1C » Tue Jan 28, 2020 9:08 pm

I think enthalpy density is a value like regular density or volume, in which the value can't be negative.

Amy Xiao 1I
Posts: 101
Joined: Sat Jul 20, 2019 12:15 am

Re: 4D.9

Postby Amy Xiao 1I » Wed Jan 29, 2020 9:28 pm

I agree with Justin, I think that since you are dividing by a volume/density, which always has to be positive, you have to get a positive answer.

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