Which equation represents a reaction that is decreasing in entropy as the reacti

Question

Which equation represents a reaction that is decreasing in entropy as the reaction proceeds?
2Na (s)     +      2H2O (l)       ------>    2NaOH (aq)     +     H2 (g)
CaCO3 (s)       ----->      CaO (s)    +    CO2 (g)
2C (s)     +     O2 (g)     ------>   2CO (g)

2H2 (g)     +    O2 (g)       ------>   2H2O (l) Which equation represents a reaction that is decreasing in entropy as the reaction proceeds? 2Na (s)     +      2H2O (l)       ------>    2NaOH (aq)     +     H2 (g) CaCO3 (s)       ----->      CaO (s)    +    CO2 (g) 2C (s)     +     O2 (g)     ------>   2CO (g) 2H2 (g)     +    O2 (g)       ------>   2H2O (l)
2Na (s)     +      2H2O (l)       ------>    2NaOH (aq)     +     H2 (g)
CaCO3 (s)       ----->      CaO (s)    +    CO2 (g)
2C (s)     +     O2 (g)     ------>   2CO (g)

2H2 (g)     +    O2 (g)       ------>   2H2O (l)

Explanation / Answer

2H2 (g) + O2 (g) ------> 2H2O (l)

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