Determine the entropy change for the reaction given below:
`2H_(2)(g) +O_(2)(g) rarr 2H_(2)O(l)`
at `300K`. If standard entropies of `H_(2)(g), O_(2)(g)`, and `H_(2)O(l)` are `126.6, 201.20`, and `68.0 J K^(-1) mol^(-1)`, respectively.

Explanation

To determine the entropy change (ΔS) for the reaction:

\[ 2H_2(g) + O_2(g) \rightarrow 2H_2O(l) \]

at 300 K, we can follow these steps:

### Step 1: Write the formula for entropy change of the reaction
The entropy change for the reaction can be calculated using the formula:
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