The answer is b. the water molecules are more closely packed together in ice than in water <span />
If the enthalpy change is negative, then the reaction is exothermic because heat energy was lost to the surroundings.
If the enthalpy change was positive, then the reaction was endothermic because heat energy was gained from the surroundings!
Hope this helps!! x
Atoms make up the mass of all materials
Atoms cannot be created or destroyed
So in a balanced chemical equation, all atoms are accounted for, and therefore all mass is accounted for and conserved.
<span>Polyethylene terephthalate formed into a cup shape. The components of polyethylene terephthalate are carbon, hydrogen and oxygen.</span>
