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Unformatted text preview: Version 002/AAAAC – Quiz 2 Measurement – lyon – (51215) 1 This print-out should have 10 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 1 2 3 4 5 6 7 AA AB AC AD BA BB BC 8 9 10 BACK NEXT BD CA CB CC CD Red = incorrect; Blue = correct; Greenish- Brown = already answered question. 001 10.0 points If the density of a substance is measured twice at the same temperatures, the density of the substance may change. 1. True 2. False correct Explanation: At constant temperature and pressure, the density of a substance remains constant. Den- sity is an intensive property, which is indepen- dent of the amount of matter. E.g. , regardless of the volume or the mass of two different sam- ples of pure water, the density is the same for both samples if the temperature is the same for both samples. However, density is a function of tempera- ture because volume varies with temperature, whereas the mass remains constant. There- fore, the density of the substance may be dif-...
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This note was uploaded on 10/25/2010 for the course CH 204 taught by Professor Leytner during the Fall '08 term at University of Texas at Austin.
- Fall '08