Which of the following reactions exhibits a d | vedclass

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(D) Entropy $(S)$ is a measure of the randomness or disorder of a system. A decrease in entropy $(\Delta S < 0)$ occurs when the number of moles of ga

Vedclass · Accepted Answer

$2H_{2(g)} + O_{2(g)} \longrightarrow 2H_2O_{(l)}$

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(D) Entropy $(S)$ is a measure of the randomness or disorder of a system. A decrease in entropy $(\Delta S $A$: $2H_2O_{2(l)} \longrightarrow 2H_2O_{(l)} + O_{2(g)}$. Here, $0$ moles of gas become $1$ mole of gas. $\Delta S > 0$.$B$: $H_{2(g)} \longrightarrow 2H_{(g)}$. Here, $1$ mole of gas becomes $2$ moles of gas. $\Delta S > 0$.$C$: $CaCO_{3(s)} \longrightarrow CaO_{(s)} + CO_{2(g)}$. Here, $0$ moles of gas become $1$ mole of gas. $\Delta S > 0$.$D$: $2H_{2(g)} + O_{2(g)} \longrightarrow 2H_2O_{(l)}$. Here, $3$ moles of gas become $0$ moles of gas (liquid). $\Delta S Therefore, reaction $D$ exhibits a decrease in entropy.

Which of the following reactions exhibits a decrease in entropy?

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