1.

What will be the change in energy for the following reaction?
H2(g)+F2(g) 2HF

A. nGiven: To break one mole of H<sub>2</sub>, energy absorbed is 436 kJ. To break one mole of F<sub>2</sub>, energy absorbed is 158 kJ. To form one moles of HF, energy released is 568 kJ.
B. 542KJ
C. -542KJ
D. 26 KJ
E. -26 KJ
Answer» C. -542KJ


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