The video below shows the evaporation of three liquids: acetone, ethanol, and water. 1. Before you watch the video, identify the intermolecular forces exhibited by each substance and gather some data on them (boiling point, enthalpy of vaporization, and anything else you think might be relevant). Make a prediction about the order in which you think the liquids will evaporate. 2. Watch the video and record your observations. Substance IMFS and other relevant information Predictions Observations Explanations Acetone Ethanol Water Prompt: Write 5 correct, distinct, and relevant facts about this demonstration. Use chemical concepts (from this chapter and/or previous chapters) to share your

The video below shows the evaporation of three liquids: acetone, ethanol, and water. 1. Before you watch the video, identify the intermolecular forces exhibited by each substance and gather some data on them (boiling point, enthalpy of vaporization, and anything else you think might be relevant). Make a prediction about the order in which you think the liquids will evaporate. 2. Watch the video and record your observations. Substance IMFS and other relevant information Predictions Observations Explanations Acetone Ethanol Water Prompt: Write 5 correct, distinct, and relevant facts about this demonstration. Use chemical concepts (from this chapter and/or previous chapters) to share your

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter9: Liquids And Solids

Section: Chapter Questions

Problem 10RQ

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What is the enthalpy change when a 1.00-kg block of dry ice, CO2(s), sublimes at 78 C? The enthalpy of sublimation of CO2(s) is 26.9 kJ/mol. Is this process exothermic or endothermic?
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Intermolecular Forces The following picture represents atoms of hypothetical, nonmetallic, monatomic elements A, B, and C in a container at a temperature of 4 K (the piston maintains the pressure at 1 atm). None of these elements reacts with the others. a What is the state (solid, liquid, or gas) of each of the elements represented in the container? b Rank the elements in the container from greatest to least, in terms of intermolecular interactions. Explain your answer. c What type(s) of intermolecular attractions are present in each of these elements? d Explain which element has the greatest atomic mass. e One of the elements in the container has a normal boiling point of 2 K. Which element would that be (A, B, or C)? How do you know? f One of the elements has a melting point of 50 K. Which element would that be (A, B, or C)? Why? g The remaining element (the one you have yet to choose) has a normal boiling point of 25 K. Identify the element. Could this element have a freezing point of 7 K? Explain. h If you started heating the sample to 20 K, explain what you would observe with regard to the container and its contents during the heating. i Describe the container and its contents at 20 K. Describe (include a drawing) how the container and its contents look at 20 K. j Now you increase the temperature of the container to 30 K. Describe (include a drawing) how the container and its contents look at 30 K. Be sure to note any changes in going from 20 K to 30 K. k Finally, you heat the container to 60 K. Describe (include a drawing) how the container and its contents look at this temperature. Be sure to note any changes in going from 30K to 60k
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