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The enthalpy of solution, \( \Delta \) solution \( \mathrm{H}^{\circ} \) is
P determined by a constant pressure calorimeter,

W with calorimeter constant of \( 342.5 \mathrm{JK}^{-1} \). On dissolving \( 1.420 \mathrm{~g} \) of \( \mathrm{Na}_{2} \mathrm{SO}_{4}(\mathrm{~s}) \) in \( 100 \mathrm{~g} \mathrm{H}_{2} \mathrm{O}(l) \), temperature increased by \( 0.037 \mathrm{~K} \). What is \( \Delta_{\text {solution }} \mathrm{H}^{\mathrm{O}} \) of \( \mathrm{Na}_{2} \mathrm{SO}_{4} \). Specific heat of water is \( 4.184 \mathrm{Jg}^{-1} \mathrm{~K}^{-1} \).
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