Neco Model Questions Vol1 2020 Chemistry Question 35
Practice objective / multiple choice question 35 from the 2020 Neco Model Questions Vol1 Chemistry examination.
For a certain substance the liquid-vapor equilibrium line on its phase diagram is linear between 350 K (pressure = 1.20×10⁵ Pa) and 400 K (pressure = 2.10×10⁵ Pa). Assuming the molar volume of the liquid is negligible compared with that of the vapor and that the vapor behaves as an ideal gas, estimate the molar enthalpy of vaporisation \(\Delta H_{vap}\) (in kJ mol⁻¹) using the Clausius-Clapeyron equation. (Take \(R = 8.314\ \text{J mol}^{-1}\text{K}^{-1}\).)
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This is Neco Model Questions Vol1 2020 Chemistry Question 35. It is one of the objective questions from the 2020 Neco Model Questions Vol1 Chemistry examination.
Difficulty level: Medium .
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