Worksheet 3 Unsolved | General Chemistry | CH 221, Assignments of Chemistry

Download Worksheet 3 Unsolved | General Chemistry | CH 221 and more Assignments Chemistry in PDF only on Docsity! Worksheet 3 1. a) What is the significance of the critical point in a phase diagram? b) Why does the line that separates the gas and liquid phases end at the critical point? 6 14 7 162. When two nonpolar organic such as hexane (C H ) and heptane(C H ) are mixed the enthalpy solchange that occurs is generally quite small. Given that )H . 0, explain why hexane and heptane spontaneously form a solution. 3. Indicate the principal types of solute-solvent interaction in each of the following solutions, and rank 2 2the solutions from weakest to strongest solute-solvent interaction: a) KCl in water, b) CH Cl in 6 6 3benzene (C H ), c) methanol (CH OH) in water. 6 5 3 24. A solution is made containing 25.5 g of phenol (C H OH) in 495 g of ethanol (CH CH OH). Calculate a) the mole fraction of phenol, b) the mass percent of phenol, c) the molality of phenol.