7:32BlackboardChapter 12Recitation Chapter 12X Read Only - Save a copy to edit.Calculating entropy change from reversible heat flowUsing the Second Law to predict spontaneous change-ChangeThe heat of fusion AH, of dichloromethane (CH₂Cl₂) is 6.2 kJ/mol. Calculate the change in entropy AS when 35. g ofdichloromethane melts at -95.1 °C.Be sure your answer contains a unit symbol and the correct number of significant digits.During an exothermic chemical reaction, a solid is consumed and a gasproduced.Mobile ViewA gas condenses to a liquid, neither absorbing nor releasing heat.A gas expands without absorbing or releasing heat.Read the descriptions of physical or chemical changes in the table below. Then decide whether the change will be spontaneous, if youcan.QADRead Aloud.5GºO Yes.O No.@Save a copyIs this change spontaneous?O Yes.O No.O Can't decide with information given.O Can't decide with information given.O Yes.O No.O Can't decide with information given.Headings 7:32Blackboard×Read Only - Save a copy to edit.Predicting qualitatively how entropy changes with temperature and volumeSystemFor each system listed in the first column of the table below, decide (if possible) whether the change described in the second columnwill increase the entropy S of the system, decrease S, or leave S unchanged. If you don't have enough information to decide, check the"not enough information" button in the last column.A few grams of acetone vapor ((CH3)₂CO).A few moles of helium (He) gas.A few moles of helium (He) gas.System20. L of pure argon (Ar) gas and20.0 L of pure krypton (Kr) gas,both at 1 atm and 44°C.Predicting qualitatively how entropy changes with mixing and separationA liter of seawater at 15°C.ChangeA 0.35 M solution of sucrose inwater, and a beaker of pure water,both at 37.°C.The acetone condenses to a liquid ata constant temperature of -12.0 °C.Qualitatively predicting reaction entropyThe helium is heated from -19.0 °Cto 59.0 °C while the volume is heldconstant at 10.0 L.The helium is heated from 0.0 °C to3.0 °C and is also compressed from avolume of 13.0 L to a volume of10.0 L.The gases are mixed, with thepressure kept constant at 1 atm.The seawater is passed through areverse-osmosis filter, whichseparates it into 750. mL of purewater and 250. mL of brine (verysalty water).The solution is put into asemipermeable bag immersed in thewater, and 50. mL of pure waterflows through the bag into thesucrose solution.ASOAS < 0OAS = 0OAS > 0not enoughinformationOFor each system listed in the first column of the table below, decide (if possible) whether the change described in the second columnwill increase the entropy S of the system, decrease S, or leave S unchanged. If you don't have enough information to decide, check the"not enough information" button in the last column.Note for advanced students: you may assume ideal gas and ideal solution behaviour.ChangeOOAS < 0OAS=0O AS > 0OOAS < 0O AS = 0OAS 0ASOAS < 0OAS = 0O AS> 0not enoughinformationΤΟ ΔS < 0OAS=0O AS >0not enoughinformationnot enoughinformationOAS <0OAS = 0O AS> 0not enoughinformation.5GcSave a copynot enoughinformation||For each chemical reaction listed in the first column of the table below, predict the sign (positive or negative) of the reaction entropyAS If it's not possible to decide with the information given, check the "not enough information" button in the last column.rxn'Note for advanced students: Assume the temperature remains constant. Assume all gases and solutions are ideal.

Entropy is the measure of a system's thermal energy per unit temperature that is unavailable for…

Chapter 12 Calculating entropy change from reversible heat flow The heat of fusion AH, of dichloromethane (CH₂Cl₂) is 6.2 kJ/mol. Calculate the change in entropy AS when 35. g of dichloromethane melts at -95.1 °C. Be sure your answer contains a unit symbol and the correct number of significant digits.

Chapter 12 Calculating entropy change from reversible heat flow The heat of fusion AH, of dichloromethane (CH₂Cl₂) is 6.2 kJ/mol. Calculate the change in entropy AS when 35. g of dichloromethane melts at -95.1 °C. Be sure your answer contains a unit symbol and the correct number of significant digits.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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