sublimation of H2O

[bamtori]

I chose C, but the answer key says E is correct.

I assumed H2O(s) --> H2(g) + O2(g). I understand there is a difference between water vapor [H2O(g)] and hydrogen/oxygen gas, but wouldn't both C and E technically be considered "sublimation" reactions? (s-->g)

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[DocVaquero]

Sublimation is one of the 6 phase changes, meaning it's a physical change. Answer C would be a chemical reaction so not technically sublimation. Hope that makes sense

 

[bamtori]

Sublimation is one of the 6 phase changes, meaning it's a physical change. Answer C would be a chemical reaction so not technically sublimation. Hope that makes sense

tricky. thanks for the explanation!