Podcast
Questions and Answers
What is the primary focus of Chapter 14 in the upcoming midterm?
What is the primary focus of Chapter 14 in the upcoming midterm?
- Liquids and Solids
- Chemical Kinetics (correct)
- Solutions
- Gases
What items are explicitly allowed during the midterm exam?
What items are explicitly allowed during the midterm exam?
- Graphing Calculator, Notes, ID
- Smartphone, Formula Sheet, Periodic Table
- Laptop, Formula Sheet, Test Bank
- Non-programmable Calculator, Pencil, Eraser, ID (correct)
How many questions will be on the exam from Chapter 7?
How many questions will be on the exam from Chapter 7?
- 8 questions
- 10 questions
- 6 questions (correct)
- 4 questions
When is Midterm 2 scheduled to take place?
When is Midterm 2 scheduled to take place?
How many questions will be dedicated to Chapter 12 on the exam?
How many questions will be dedicated to Chapter 12 on the exam?
What should students do when they are certain of an answer on the Akindi sheet?
What should students do when they are certain of an answer on the Akindi sheet?
Which material is provided for students during the exam?
Which material is provided for students during the exam?
Where can students find their assigned exam room?
Where can students find their assigned exam room?
How many moles of helium are found in a balloon that contains 5.5 L of helium at a pressure of 1.15 atm and a temperature of 22.0 ºC?
How many moles of helium are found in a balloon that contains 5.5 L of helium at a pressure of 1.15 atm and a temperature of 22.0 ºC?
What is the volume of O2 gas in a balloon at 1.0 atm and 305 K, after the temperature is lowered to 77 K?
What is the volume of O2 gas in a balloon at 1.0 atm and 305 K, after the temperature is lowered to 77 K?
Identify the gas from a 3.50 g sample in a 1.5 L container with a pressure of 2.42 atm at 355 K.
Identify the gas from a 3.50 g sample in a 1.5 L container with a pressure of 2.42 atm at 355 K.
Which of the following gases will have the greatest average velocity at 300 K?
Which of the following gases will have the greatest average velocity at 300 K?
Which type of intermolecular force is considered the strongest?
Which type of intermolecular force is considered the strongest?
What is the preferred writing instrument on exams to allow for answer changes?
What is the preferred writing instrument on exams to allow for answer changes?
How much energy is required to heat a 29.0 g sample of acetone from a solid at −94.8°C to −50.0°C?
How much energy is required to heat a 29.0 g sample of acetone from a solid at −94.8°C to −50.0°C?
What phase is present after the temperature is increased to the critical temperature at constant pressure?
What phase is present after the temperature is increased to the critical temperature at constant pressure?
If a certain metal forms in a FCC unit cell with an edge length of 3.52 Ã…, what is the radius of one atom?
If a certain metal forms in a FCC unit cell with an edge length of 3.52 Ã…, what is the radius of one atom?
Why is chloroform, CHCl3, more soluble in water than is carbon tetrachloride, CCl4?
Why is chloroform, CHCl3, more soluble in water than is carbon tetrachloride, CCl4?
When a room-temperature solution saturated in KCl and CO2 is heated to near boiling, what is most likely to occur?
When a room-temperature solution saturated in KCl and CO2 is heated to near boiling, what is most likely to occur?
What is the mass percent of a solution prepared from 15 g of NaCl in 45 g of H2O?
What is the mass percent of a solution prepared from 15 g of NaCl in 45 g of H2O?
What is the molar mass of lauryl alcohol if 5.00 g of it in 0.100 kg of benzene freezes at 4.1°C?
What is the molar mass of lauryl alcohol if 5.00 g of it in 0.100 kg of benzene freezes at 4.1°C?
What is the rate of disappearance of NO during the first 100 seconds?
What is the rate of disappearance of NO during the first 100 seconds?
If the rate of appearance of O2 is 0.0014 Ms–1, what is the rate of disappearance of H2O2?
If the rate of appearance of O2 is 0.0014 Ms–1, what is the rate of disappearance of H2O2?
What is the value of the rate constant, k, for the reaction given the initial rates and concentrations?
What is the value of the rate constant, k, for the reaction given the initial rates and concentrations?
For a reaction following first order kinetics with an initial concentration of 1.5 M and rate constant 0.0294 s–1, what is the concentration after 24.5 seconds?
For a reaction following first order kinetics with an initial concentration of 1.5 M and rate constant 0.0294 s–1, what is the concentration after 24.5 seconds?
How long will it take for a zero order reaction with a rate constant of 0.28 to reach 30% of its original concentration of 1M?
How long will it take for a zero order reaction with a rate constant of 0.28 to reach 30% of its original concentration of 1M?
What is the activation energy (Ea) of the process that correlates chirping rates of crickets to temperature?
What is the activation energy (Ea) of the process that correlates chirping rates of crickets to temperature?
What is the incorrect assumption to make when determining the rate of a reaction?
What is the incorrect assumption to make when determining the rate of a reaction?
In a first order reaction, what is the relationship between concentration and time?
In a first order reaction, what is the relationship between concentration and time?
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Study Notes
Midterm Information
- Midterm Date: Friday, November 8th, 2024
- Midterm Time: 6:30 PM (EST) – 8:30 PM (EST)
- Exam Location: See Announcement on D2L for Exam Rooms
- Format: 25 Multiple Choice Questions
- Chapters covered: Chapters 7, 12-14
- Allowed tools: Non-programmable Calculator, Pencil, Eraser, ID
- Materials provided: Formula Sheet and Periodic Table
Exam Breakdown
- Chapter 7 - Gases: 6 Questions
- Chapter 12 - Liquids and Solids: 6 Questions
- Chapter 13 – Solutions: 6 Questions
- Chapter 14 – Chemical Kinetics: 7 Questions
Study Resources
- D2L Interactive Examples: short videos on essential skills
- D2L Video Tutorials
- Textbook Questions (odd-numbered)
- Adaptive Assignments on Achieve
- Past Exams (available for practice)
Important Notes
- Check D2L for your assignment to a specific exam room in Kerr Hall East
- Fill out an Akindi Sheet by bubbling in your Student Number and Version Number correctly
- Use a pencil on the Akindi Sheet so you can erase mistakes
- No Student Number or Version Number on the Akindi Sheet results in a score of 0
Study Tips
- Don’t make new notes; focus on summarizing already existing notes
- Quiz yourself using existing notes and practice problems
- Practice questions are key to success
- Bounce between different topics closer to the exam date
- Take care of yourself - eat well, take breaks, and get a good night's sleep!
Concept Review
- Gas Laws:
- Ideal Gas Law: PV = nRT
- Boyle's Law: P1V1 = P2V2
- Charles's Law: V1/T1 = V2/T2
- Avogadro's Law: V1/n1 = V2/n2
- Dalton's Law of Partial Pressures: Ptotal = P1 + P2 + ...
- Kinetic Molecular Theory:
- Gases are composed of particles constantly in random motion with negligible volume
- Average kinetic energy is proportional to absolute temperature (KE = (1/2)mv^2)
- Intermolecular Forces:
- Dispersion Forces: Weakest forces, present between all molecules; increase with increasing molecular size
- Dipole-Dipole Forces: Between polar molecules with permanent dipoles
- Hydrogen Bonding: Strongest dipole-dipole interaction; involves hydrogen bonded to highly electronegative elements (N, O, F)
- Ion-Dipole Forces: Between ions and polar molecules
- Liquids and Solids:
- Properties of liquids: fluidity, viscosity, surface tension, and vapor pressure
- Types of solids: crystalline and amorphous
- Crystalline solids have a regular, repeating arrangement of atoms or molecules: ionic, covalent, metallic, and molecular solids
- Solutions:
- Concentration units: molarity, molality
- Solute-Solvent Interactions: "like dissolves like"
- Factors affecting solubility: temperature, pressure, and nature of solvent and solute
- Colligative properties: vapor pressure lowering, freezing point depression, boiling point elevation, and osmotic pressure
- Chemical Kinetics:
- Factors affecting reaction rate: concentration, temperature, and surface area
- Rate Law: expresses the relationship between the rate of a reaction and the concentration of reactants
- Reaction order: determined by the exponents in the rate law
- Integrated rate laws: used to determine the concentration of reactants or products at any given time
- Activation energy: minimum amount of energy required for a reaction to occur
- Catalysts: substances that increase the rate of a reaction without being consumed
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