Wednesday
April 1, 2015

Homework Help: Chemistry

Posted by Kayla on Tuesday, July 2, 2013 at 8:01pm.

H2 and F2 react according to the following equation, forming HF.
H2(g) + F2(g)  2HF(g); H° = –271 kJ
If H2(g) and F2(g) were mixed in a thermally insulated vessel, the reaction that occurred would be

a. endothermic, and the temperature of the reaction system would fall.
b. We could not tell unless the original and final temperatures were given.
c. exothermic, and the temperature of the reaction system would fall.
d. exothermic, and the temperature of the reaction system would rise.
e. endothermic, and the temperature of the reaction system would rise.

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