Determine total h for bonds broken and formed, the overall change in h, and the final answer with units. is it endothermic or exothermic? reaction: 2h2(g) +o2(g) -> 2h2o^(g) given: h-h 436 o+o 499 o-h 463

2 H-H + O=O → 2 H-O-H

There are two moles of H-H bonds and one mole of O=O bonds in one mole of reactants. All of them will break in the reaction. That will absorb

Each mole of the reaction will form two moles of water molecules. Each mole of H₂O molecules have two moles O-H bonds. Two moles of the molecule will have four moles of O-H bonds. Forming all those bond will release

Heat of the reaction:

is negative. As a result, the reaction is exothermic.

organisms are more likely to be more preserved in mud than sand because mud is moist and wet, while sand is very dry.