Most chemical reactions will either absorb heat or release heat. A reaction that absorbs heat is an endothermic reaction, whereas a reaction that releases heat is an exothermic reaction. The release or absorption of heat is known as the heat of reaction. Calculate the number of kJ required for the reaction shown below, if you begin with 45.0 grams of water (H2O), and the ΔHrxn = 571.6 kJ.
2 H2O(l) → 2 H2(g) + O2(g)
A) 714 kJ
B) 2.85 × 10³ kJ
C) 357 kJ
D) 1.43 × 10³ kJ