Consider the following thermochemical equations.
Reaction ΔrH° / kJ mol-1
HF(g) ? H(g) + F(g) 568
H2(g) ? 2 H(g) 436
HF(g) ? ½ H2(g) + ½ F2(g) 271
What is ΔrH° for the reaction below?
2 F(g) ? F2(g)
Give your answer in kJ mol-1, accurate to three significant figures. Do not include units in your answer.
ΔrH° = kJ mol-1