Which one of the equations below is an endothermic reaction?
A) Sro (s) + CO, (9) - SrCO, (S)AH° = -234
KJ/mol
B) H2(g) + F2 (g) 2 HF (9) AH° = -79.2
KJ/mol
C) H2 (9) + C (s) + N, (g) - 2 HCN (9) AH° =
270.3 kJ/mol
D) 2 K (s) + 2 H20 (1)
AH° = -393.1 kJ/mol
2 KOH (aq) + H2 (9)