When the substances below are arranged in order of increasing entropy values, S° , at 25° C which is the correct order?

The order of increasing entropy for the given molecules,

${\mathrm{CO}}_2\left(g\right)<{\mathrm{CO}}_2\left(s\right)<{\mathrm{CO}}_2\left(aq\right)$

Here, the entropy increases with randomness.