Recitation Worksheet Six Olivia Beavers UGA ID Name Textbook Chemistry Chemical Reactivity by John C Kotz Paul M Treichel John R Townsend David Treichel 11th Edition Copyright 2024 Instructions 0471748 This recitation worksheet covers Ch 5 1 5 5 heating curves omitted Please enter your first and last name as it appears on the eLC roster do not use a nickname that is not reflected in eLC Your UGA myID is a combination of letters and numbers example Dr Seivert s MyID is mds73312 Do not use your 81x number Your completed worksheet has to be submitted to Gradescope You have multiple options for submission o You may use an app to annotate the worksheet by placing your answers in the answer boxes and showing your work when appropriate Afterward submit the worksheet to Gradescope You will not need to upload anything to eLC o You may print out the worksheet write your answers in the answer boxes and show your work on it when appropriate Afterward convert the worksheet to a PDF and submit to Gradescope You will not need to upload anything to eLC If you do not have access to a printer you may type your answers directly into the worksheet PDF and then submit it to Gradescope Write your work on separate sheets of paper convert them to a PDF and upload to the appropriate dropbox on eLC o There is a Gradescope app available for both iOS and Android devices that allows you to scan and submit your printed work or you can submit your fillable PDF directly o The following criteria must be met to be eligible for full credit o You must make sure the pages are in the correct order and have the same layout as the original worksheet when submitting to Gradescope regardless of your submission type o Answers must be written in the corresponding answer boxes o You must show your work when appropriate This worksheet is due no later than 9 00 AM on the Saturday of the recitation A periodic table and formula sheet are attached to the end of this worksheet Please keep these attached to your worksheet in the correct order when submitting to Gradescope week 1 A silver rod is heated to 150 C and placed in a beaker of water at room temperature After some time both the water and silver rod are at the same temperature Assuming no heat is lost to the surroundings which of the following is are true A The beaker of water and silver rod together are considered an open system B Thermal equilibrium is met in this process C Heat transferred from the silver rod to the water D All of the above are true E None of the above are true 2 Which of the following are endothermic processes Select any that apply and answer using capital letters with no spaces e g ABCDE A When solid KBr is dissolved in water the solution gets colder B When concentrated H2SO4 is added to water the solution gets very hot C Water is boiled in a tea kettle D Water condenses on a cold pipe 3 Which of the following is a state function D BC C A q B w C q w D q w E More than one of the options above are state functions F None of the above are state functions 4 What is true when heat goes from the surroundings to the system Select any that apply and answer using capital letters with no spaces e g ABCDE DE A The sign of the heat change in the surroundings is positive B Work is done on the system C The internal energy of the system increases D The potential energy of the surroundings increases E The sign of the heat change in the system is positive 5 Which statement is true if H 85 J c A The system is gaining 85 J the surroundings are losing 85 J The process is exothermic B The system is gaining 85 J the surroundings are losing 85 J The process is endothermic C The system is losing 85 J the surroundings are gaining 85 J The process is exothermic D The system is losing 85 J the surroundings are gaining 85 J The process is endothermic E Both the system and surroundings are losing 85 J The process is exothermic 6 The change in internal energy of a system is 123 J If 85 J of work was done on the system by the surroundings how much was heat exchanged in J Report your answer in standard notation 208 J kJ 129 7 Consider a system that absorbs 225 kJ of heat and performs 96 kJ of work on the surroundings at constant pressure What is the E or U in this process What is H Report your answers in standard notation E H 8 In which of the following reactions would PV work occur Select any that apply and answer using capital letters with no spaces e g ABCDE 225 kJ BC A N2 g O2 g 2 NO g B N2 g 3 H2 g 2 NH3 g C 3 Mg s N2 g Mg3N2 s D C s O2 g CO2 g E Ba OH 2 aq H2SO4 aq BaSO4 aq 2 H2O l 9 In which of the following reactions would PV work not occur B 10 a A 2 C2H6 g 7 O2 g 4 CO2 g 6 H2O l B CO g H2O g CO2 g H2 g C 8 N2O5 g 16 NO2 g 4 O2 g D Ba s CO2 g O2 g BaCO3 s E 2 Na s 2 H2O l 2 NaOH aq H2 g F More than one of the options above G None of the options above 10 Samples of copper silver and gold are all subjected to equal amounts of heat Which metal will undergo the smallest change in temperature if they all have equal masses The molar heat capacities of each metal are given in the table below Molar Heat Capacity J mol 1 K 1 Metal Copper Silver Gold 24 4 24 9 25 6 A Copper B Silver C Gold D The change of temperature will be the same since equal amounts of heat are being applied 11 Samples of 100 g of each of the metals pictured below are all heated then placed in identical coffee cup calorimeters where they all reach the same final temperature Which was initially heated to the highest temperature B A Magnesium B Lead C Copper D Iron E All of them would cause identical temperature changes in the calorimeters 12 Liquid bromine has a specific heat of 0 226 J g 1 K 1 What is liquid bromine s molar heat capacity in J mol C Report your answer in standard notation 36 1 J mol C 13 Consider an experiment in which it is determined that 2 66 kJ of heat is required to raise the temperature of 80 0 g of an unknown organic compound by 15 0 K Based on this information what is the specific heat of …