Which is the correct equation for sublimation?

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Problem

Which is the correct equation for sublimation? (1) CO2(s)→CO2(g)\text{CO}_2(\text{s}) \rightarrow \text{CO}_2(\text{g}) (2) CO2(g)→CO2(s)\text{CO}_2(\text{g}) \rightarrow \text{CO}_2(\text{s}) (3) H2O(s)→H2O(l)\text{H}_2\text{O}(\text{s}) \rightarrow \text{H}_2\text{O}(\text{l}) (4) CO2(g)→CO2(aq)\text{CO}_2(\text{g}) \rightarrow \text{CO}_2(\text{aq})

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