How much heat will be liberated if 10g of hydrogen burns in excess oxygen according to the following thermochemical equation?
H_2(g) + ¹⁄₂O_2(g) → H₂O_(l)
ΔH° = -286KJ

• A.-1430 KJ
• B.-2860 KJ
• C.-572 KJ
• D.-287 KJ