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(C) The chemical reaction is: $NH_3(g) + HCl(g) \rightarrow NH_4Cl(g)$The relationship between enthalpy change $(\Delta H)$ and internal energy change

Vedclass · Accepted Answer

$\Delta H < \Delta U$

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(C) The chemical reaction is: $NH_3(g) + HCl(g) ightarrow NH_4Cl(g)$The relationship between enthalpy change $(\Delta H)$ and internal energy change $(\Delta U)$ is given by: $\Delta H = \Delta U + \Delta n_g RT$Where $\Delta n_g$ is the change in the number of moles of gaseous species.$\Delta n_g = (	ext{moles of gaseous products}) - (	ext{moles of gaseous reactants})$$\Delta n_g = 1 - (1 + 1) = 1 - 2 = -1$Substituting this into the equation: $\Delta H = \Delta U - RT$Since $RT$ is positive,it follows that $\Delta H < \Delta U$.

If one mole of ammonia and one mole of hydrogen chloride are mixed in a closed container to form ammonium chloride gas,then

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