CHE 131 General Chemistry IB Exam 3 Form 1A

CHE 131, Exam 3 Fall 2023 Form 1A 1 CHE 131 Exam 3 Fall 2023 Version 1A Directions: 1. Do not open this exam until told to do so. 2. Place your ID (face up), pencils, erasers, and a scientific calculator at your des ...

CHE 131, Exam 3 Fall 2023 Form 1A 1 CHE 131 Exam 3 Fall 2023 Version 1A Directions: 1. Do not open this exam until told to do so. 2. Place your ID (face up), pencils, erasers, and a scientific calculator at your desk. 3. Place all other items out of sight at the side of the room and/or under your seat. 4. Verify that the Form number (1A, 2B, 3C, or 4D) on your Scantron and your exam packet match. a. On your Scantron, write and bubble in: i. LAST NAME ii. FIRST NAME iii. IDENTIFICATION NUMBER 5. Under Course Name, write “CHE 131”. 6. All Scantron forms must be submitted by 9:50 pm. No extra time will be given. 7. All answers must be entered on the Scantron answer sheet, which you must turn in before leaving. Scantrons will not be returned; record your answers in the space provided in the exam packet next to each question for comparison with the answer keys when they are posted on Brightspace. Use blank spaces between questions, backs of pages, and extra sheets for scratch work and calculations. 8. Once you open the exam, double check that you have all exam pages, including a Periodic Table and a sheet of useful conversions, constants, and equations. Page numbers and total number of pages are at the bottom of each page. If you are missing pages, request a new copy of the exam. 9. During the exam you will be asked to show your ID and sign in on an attendance sheet. 10. General Chemistry Policies: a. Possession of cell phones, other digital devices, or any unauthorized materials during the exam will result in a grade of 0 on this exam, a report to Academic Judiciary, and a possible grade of F for the course. b. If you do not have an ID to verify your identity, you must see Dr. Crapo the day after the exam and show her a valid ID.CHE 131, Exam 3 Fall 2023 Form 1A 2 Blank PageCHE 131, Exam 3 Fall 2023 Form 1A 3 Conversion Factors Mass Temperature Pressure 1 lb = 453.59237 g TC = 5/9(TF – 32) 1 Pa = 1 N m-2 1 lb = 16 oz TK = TC + 273 K = 1 kg m-1 s-1 TF = (9/5)TC + 32 1 atm = 101.325 kPa Length = 760 mmHg 1 km = 0.62137 miles Energy =760 Torr 1 Å = 10-10 m 1 Joule = 1 kg m2 s-2 = 14.70 lb/in2 1 in = 2.54 cm = 0.2390 calorie 1 bar = 1 x 105 Pa = 1 C x 1 V Volume = 1 Pa m3 1 L = 1.056710 qt 1 L atm = 101.325 J 1 gallon = 4 quarts 1 Cal = 1000 cal Physical and Chemical Constants electron mass = 9.109 × 10–31 kg kB = 1.381 x 10-23 J K-1 F = 96,485 C mol-1 proton mass = 1.672621 × 10–27 kg RH = 2.178 x 10-18 J 1 Ci = 3.70 x 10-10 d/s neutron mass = 1.674927 × 10–27 kg 1 MeV = 1.6022 x 10-13 J ke = 8.9875 x 109 N m2 C-2 electron charge = 1.602 × 10–19 C 1 amu = 1.66054 x 10-27 kg p = 3.141592654 NA = 6.002 x 1023 mol 1 amu = 931.5 MeV R = 0.08206 L atm mol-1 K-1 = 8.314 J K-1 mol-1 c = 2.988 x 108 m s-1 h = 6.626 x 10-34 J s Properties of Water Heat Capacities J g-1 K-1 J mol-1 K-1 r = 1.00 g//mL = 1.00 g/cm3 Water (steam) 2.080 37.47 DHfus = 6.01 kJ/mol Water (liquid, 25°C) 4.184 75.327 DHvap = 40.68 kJ/mol Water (ice, -10°C) 2.050 38.09 Kw = 1.00 x 10-14 at 298 K Standard Thermodynamic Conditions 1 atm 1 M 298 K STP: 1 bar, 0°C Equations DE = q + w c = ln PV = nRT PA = XA x Ptotal DH = DE + PDV @ constant pressure E = hn !𝑃 + 𝑛!𝑎 𝑉! ' (𝑉 − 𝑛𝑏) = 𝑛𝑅𝑇 𝑋" = 𝑛" 𝑛#$#%& w = -PextDV E = '( ) 𝑃*𝑉* 𝑛*𝑇* = 𝑃!𝑉! 𝑛!𝑇! 𝐹 = 𝑘𝑞*𝑞! 𝑟! DH°rxn = SmDH°f (products) - SnDH°f (reactants) q = mCsDT 𝑐 +,- = 53𝑅𝑇 𝑀𝑀 DH°rxn = SDH°reactant bonds broken - SDH°product bonds formed 𝑢" 𝑢. = 5𝑀𝑀. 𝑀𝑀"CHE 131, Exam 3 Fall 2023