q1s07 - Version 001 Quiz 1 David Laude (53015) 1 This...

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Unformatted text preview: Version 001 Quiz 1 David Laude (53015) 1 This print-out should have 8 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. V1:1, V2:1, V3:1, V4:1, V5:2. You will have 20 minutes for the quiz. Please make sure you write your version num- bers on your scantron. Good luck! ChemPrin3e T06 35 18:05, general, multiple choice, < 1 min, fixed. 001 (part 1 of 1) 5 points How much heat is required to vaporize 50.0 g of water if the initial temperature of the water is 25.0 C and the water is heated to its boiling point where it is converted to steam? The specific heat capacity of water is 4 . 18 J ( C)- 1 g- 1 and the standard en- thalpy of vaporization of water at its boiling point is 40 . 7 kJ mol- 1 . 1. 169 kJ 2. 64.2 kJ 3. 40.7 kJ 4. 129 kJ correct 5. 23.5 kJ Explanation: m = 50 g T i = 25 C T f = 100 C C = 4 . 18 J / g / C H vap = 40 . 7 kJ/mol H = mC T + m MM H vap = (50 g)(4 . 18 J / g / C) (100- 25) C 1 kJ 1000 J + 50 g 18 g / mol (40 . 7 kJ / mol) = 128 . 731 kJ ChemPrin3e T08 34 14:10, basic, multiple choice, < 1 min, fixed....
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q1s07 - Version 001 Quiz 1 David Laude (53015) 1 This...

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