10-7-08[lecture10]ll

10-7-08[lecture10]ll - Chem 116 Lecture 10(LL i-clicker...

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Chem 116 Lecture 10 10-7-08 (LL) i-clicker question Answer: A, Na and Cl ions Solute-Ions Solvent- H 2 O Once NaCl is mixed into the solution is it no longer in the solid form, it breaks into ions Know the difference between mass and moles What does the “partial” pressure of He mean? Fraction on the He atoms that collide with the walls of the container Pressure is from collision of gas particles with the walls Boiling – The vapor pressure of the solvent is at or higher than P atm Water- extends a liquid phase, increase the boiling point and decreases the melting point Normal boiling point example: Pure Water boils at 100.00C when the P atm = 1 atm (normal pressure) In a solution that contains a solvent and solute has a higher boiling point then just the solvent alone What does the boiling point elevation depend on? Being solute and not just pure solvent Non idea solute has a non negligible vapor pressure Particle level model of boiling point elevation In a solution (solute + solvent) there are less water molecules escaping into the vapor
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This note was uploaded on 12/02/2011 for the course PHYSICS 235 taught by Professor Staff during the Fall '08 term at Rutgers.

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10-7-08[lecture10]ll - Chem 116 Lecture 10(LL i-clicker...

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