Homework 2-problems-1 - tran(pt4954 – Homework 2 –...

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Unformatted text preview: tran (pt4954) – Homework 2 – sutcliffe – (51045) 1 This print-out should have 21 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. NOTE: AFTER QUESTION 15 READ CAREFULLY! Some questions will require you to consider the vant’Hoff factor, i. If the solute is stated to be a nonelectrolyte, or if it is a sugar, i = 1. Assume complete dissocia- tion of ionic compounds. 001 10.0 points The molar heat of vaporization of carbon disulfide (CS 2 ) is 28.4 kJ/mol at its nor- mal boiling point of 46 ◦ C. How much energy (heat) is required to vaporize 1 g of CS 2 at 46 ◦ C? Answer in units of Joules 002 10.0 points How much heat energy is needed to raise the temperature of a 52 g sample of aluminum from 29 . 3 ◦ C to 91 . 6 ◦ C? The specific heat of aluminum is 0 . 897 J / g · K. Answer in units of J 003 10.0 points Consider the following specific heats SH H 2 O(s) = 2 . 09 J / g · ◦ C , SH H 2 O( ℓ ) = 4 . 18 J / g · ◦ C , and SH H 2 O(g) = 2 . 03 J / g · ◦ C. The heat of fusion for water is 334 J/g and the heat of vaporization for water is 2260 J/g. Calculate the amount of heat required to convert 65 g of ice at- 35 ◦ C completely to steam at 131 ◦ C. Answer in units of kJ 004 10.0 points How many grams of a 13 . 8% potassium sul- fate solution would contain 501 . 7 g potassium sulfate? Answer in units of g 005 10.0 points What volume of 0.256 M sodium bromide contains 18.7 grams of sodium bromide?...
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This note was uploaded on 09/20/2011 for the course CALCULUS 7234832 taught by Professor Campsisi during the Spring '11 term at University of Texas.

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Homework 2-problems-1 - tran(pt4954 – Homework 2 –...

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