Water (H20) can decompose in an endothermic reaction to form hydrogen (H2) and oxygen (O2). 2H20(1) - 2H2(g) + O2(g)
Forming the bonds in 1 mole of hydrogen molecules releases 436 kJ of energy. Forming the bonds in 1 mole of oxygen molecules
releases 495 kJ of energy.
When 2 moles of water decompose and form hydrogen and oxygen gases, 475 kJ of energy are absorbed from the surroundings.
How much energy is absorbed when the bonds are broken in 1 mole of water?
OA. 1,842 kJ
B. 921 kJ
C. 703 kJ
OD. 456 kJ