For which one of the following reactions is t | vedclass

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(D) $Entropy$ $(S)$ is a measure of the randomness or disorder of a system. $A$ positive change in entropy $(\Delta S > 0)$ occurs when the system

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$H_2O_{(l)} \longrightarrow H_2O_{(g)}$

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(D) $Entropy$ $(S)$ is a measure of the randomness or disorder of a system. $A$ positive change in entropy $(\Delta S > 0)$ occurs when the system becomes more disordered,such as during a phase transition from liquid to gas.
In the reaction $H_2O_{(l)} \longrightarrow H_2O_{(g)}$,water changes from a liquid state to a gaseous state. Since gas molecules have much higher freedom of movement and randomness compared to liquid molecules,the entropy of the system increases.
In the other options,the reactions involve a decrease in the number of moles of gas or a transition to a more ordered state (like liquid to solid or gas to solid),which results in a negative entropy change.

For which one of the following reactions is the entropy change positive?

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