The enthalpy of vaporization of liquid A at is 32

CHEMISTRY · Subjective · A Level · Chemistry · Thermodynamics · Thermodynamics

Problem

The enthalpy of vaporization of liquid A at 42∘C42^\circ\text{C} is 32 kJ/mole\text{kJ/mole}. If the normal boiling point of liquid is 47∘C47^\circ\text{C}, using the given data, find ΔSvapourisation\Delta S_{\text{vapourisation}} at 42∘C42^\circ\text{C} (in J/K mole\text{J/K mole}) Cp[A(l)]=62 J/K moleC_p[A(\text{l})] = 62 \text{ J/K mole} Cp[A(g)]=30 J/K moleC_p[A(\text{g})] = 30 \text{ J/K mole} A(l)→A(g)A(\text{l}) \rightarrow A(\text{g}) take ln⁡(315320)=(−5320)\ln \left( \frac{315}{320} \right) = \left( \frac{-5}{320} \right)

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