Question

Given the chemical equation, predict the ΔS system for this change.

Answer 1

Answer : The $\Delta S$ system for this change is, negative $(-\Delta S)$.

Explanation :

Entropy : It measure the randomness and the disorderedness of the system.

As we know that the entropy increases, $(+\Delta S)$ as we are moving from the solid state to liquid state and liquid state to gaseous state and the entropy decreases, $(-\Delta S)$ as we are moving from gaseous state to liquid state and liquid state to solid state.

The given reaction is,

$O_2(g)\rightarrow O_2(aq)$

In this reaction, the phase changes from gaseous state to liquid or aqueous state. That means the entropy of the system for this change will be negative.

Hence, the $\Delta S$ system for this change is, negative $(-\Delta S)$.