Given : HCl _ (g) + 40 H _2 O HCl (40 H _2 O ); H = -73.0 kJ HCl _ (g) + 10 H _2 O…

CHEMISTRY · Single correct · A Level · Chemistry · Energetics · Energetics

Problem

Given :

\text{HCl}_{(g)} + 40\text{H}_2\text{O} \longrightarrow \text{HCl}(40\text{H}_2\text{O}); \Delta H = -73.0 \text{ kJ}

\text{HCl}_{(g)} + 10\text{H}_2\text{O} \longrightarrow \text{HCl}(10\text{H}_2\text{O}); \Delta H = -69.0 \text{ kJ}

then integral heat of dilution for two moles of

\text{HCl}(10\text{H}_2\text{O})

\text{HCl}(40\text{H}_2\text{O})

is : (1) -4.5 kJ (2) -3.5 kJ (3) -8.0 kJ (4) -2.0 kJ