Neco 2019 Chemistry Question 15
Practice objective / multiple choice question 15 from the 2019 Neco Chemistry examination.
The vapor pressure of a liquid follows the Clausius-Clapeyron relation \( \ln P = -\dfrac{\Delta H_{\text{vap}}}{R}\dfrac{1}{T} + C \). At 298 K the vapor pressure is 0.40 kPa, and at 308 K it is 0.70 kPa. (R = 8.314 J·mol⁻¹·K⁻¹). Determine the enthalpy of vaporisation \( \Delta H_{\text{vap}} \) (in kJ·mol⁻¹) and predict the vapor pressure at 318 K.
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About This Question
This is Neco 2019 Chemistry Question 15. It is one of the objective questions from the 2019 Neco Chemistry examination.
Difficulty level: Medium .
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