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Determining temperature of a reaction (7.51)

Posted: Sun Jan 18, 2015 11:31 pm
by K Honeychurch 1K
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.

Re: Determining temperature of a reaction (7.51)

Posted: Sun Jan 18, 2015 11:39 pm
by Niharika Reddy 1D
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.