Which of the following reactions shows work o | vedclass

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(A) Work of compression occurs when the volume of the system decreases during a reaction,which corresponds to a negative change in the number of moles

Vedclass · Accepted Answer

$NH_{3(g)} + HCl_{(g)} \longrightarrow NH_4Cl_{(s)}$

Vedclass · Answer

(A) Work of compression occurs when the volume of the system decreases during a reaction,which corresponds to a negative change in the number of moles of gas $(\Delta n_g In option $A$: $NH_{3(g)} + HCl_{(g)} \longrightarrow NH_4Cl_{(s)}$,the change in moles of gas is $\Delta n_g = 0 - (1 + 1) = -2$. Since the volume decreases significantly as gaseous reactants form a solid,this reaction shows work of compression.In option $B$: $\Delta n_g = 3 - 1 = +2$ (Expansion).In option $C$: $\Delta n_g = (2 + 1) - 2 = +1$ (Expansion).In option $D$: $\Delta n_g = 1 - 0 = +1$ (Expansion).Therefore,the correct reaction is $NH_{3(g)} + HCl_{(g)} \longrightarrow NH_4Cl_{(s)}$.

Which of the following reactions shows work of compression?

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