Determining temperature of a reaction (7.51)

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K Honeychurch 1K
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Joined: Fri Sep 26, 2014 2:02 pm

Determining temperature of a reaction (7.51)

Postby K Honeychurch 1K » Sun Jan 18, 2015 11:31 pm

Problem 7.51 asks for the change in internal energy for the reaction of 1.00 mol OF2 with hydrogen that produces O2 and HF. When calculating the work you use the ideal gas law PV=nRT. What I don't understand is how you determine temperature if it is not given in the problem. The solutions manual uses 298 K as the temperature. Where did that come from? Thanks.

Niharika Reddy 1D
Posts: 127
Joined: Fri Sep 26, 2014 2:02 pm

Re: Determining temperature of a reaction (7.51)

Postby Niharika Reddy 1D » Sun Jan 18, 2015 11:39 pm

I think we assume the temperature is 298 K when it is not stated because page 265 in the textbook says most thermochemical data are reported for 25° C, which is 298.15 K. It also says all reaction enthalpies used in the textbook are for 298.15 K unless otherwise indicated.


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