Editing 2021-2022 Gases

ChemistryWiki | RecentChanges | Preferences

Since we are starting to get back to pre-pandemic conditions, you will perform demo or "mini-lab" tasks to help you understand the relationship between different parameters/variable with gases. So there will be a demo/task for Boyles Law, Charles' Law and Gay - Lussac's Law (at one time I called it the No Name Law). Hopefully, these demos will give you a "simple physical understanding" of how gas particles behave and the mathematical relationship between gas parameters/variables. 
 
We will first look at the Particle view of Gases including the 4 main parameters/characteristics of gas particles, under General Information on Gases. 
 
General Information on Gases 
*[https://www.youtube.com/watch?v=EAT4yc0Gsdg&feature=youtu.be You Tube Video on the Behavior of Gas Particles] - If using Edpuzzle, file name: <nowiki>GasParticleBehaviorVideo</nowiki> (about 11 mins).
**[http://www.tmcleod.org/Level1/Chem328Gas/GasBehaviorHandout.pdf Handout of Behavior of Gas Particles] - Notes that include all 3 webpages below and other hand notes
***KineticTheoryofGas
***GasParameters
***GasPressure
 
So now you should know that Gas particles have four parameters (think of the gas particles in a balloon): 
a) Volume, volume gas particle occupy not actual size of particle, usually in mL or L (symbol V) 
b) Number of gas particles, in number of moles (symbol n) 
c) Gas pressure (I think of number of hits on the container wall for all the gas particle in substance), many different unit but atm is most used, (symbol P) 
d) Temperature, energy that the gas particle has, ALWAYS in Kelvin temperature scale K, (symbol T): MOST IMPORTANT ONE TO REMEMBER 
 
Now we will start taking a look at Gas calculations. There are "a lot" of gas calculations "out there" so I have found it is best to organize them into different groups. However, all of the equations are derived or comes from the Ideal Gas law (that will be explained below). 
 
Unlike some of the other chemical concepts, for gas calculations, I think it is important to have an overview of all the gas calculations before dealing with any specific gas calculation. 
 
SO the next section deals with Overview. Before you start looking at the Youtube video, I would like to emphasize what I call a Condition. Each condition is a gas (actually a lot of gas particles) that can be describe with the 4 parameters (V,n,P,T). So there are 2 possibilities: 
a) 1 Condition problem: this is where one is just describing the gas using the 4 parameters (no action verbs in question/problem 
b) 2 Condition problem : this is where one is "doing something" to the gas SO there is the initial condition (Condition 1) and then after you do something (i.e. increasing temp, decreasing volume), you have the new condition (Condition 2). Usually, people use 1 and 2 as subscripts in the equation (see Gas Law Equation sheet below). 
 
Here is a more in-depth overview. 
 
Overview of Gas Calculations 
*[https://www.youtube.com/watch?v=3Qw13w-NSOQ&feature=youtu.be You Tube Video for Overview of Gas Calculations] - If using Edpuzzle, file name: <nowiki>GasOverviewHandoutVideo</nowiki> (14 min)
**[http://www.tmcleod.org/Level1/Chem328Gas/GasOverviewHandout.pdf Overview of Gas Calculations] - Reference on which law to use for problem
***[[Steps to Calculate Gas Problems]] - General Procedures to follow for all the calculations below
***[http://www.tmcleod.org/Level1/Chem328Gas/GasLawExampleofWork.pdf Actual Example of Work for Gas Problems] (has actual work on page) 
 
Now we will turn our attention to each law specifically. 
Here are all the equations on one page, 
**[http://www.tmcleod.org/Level1/Chem328Gas/GasLawEquationSheet.jpg Gas Law Equation Sheet]

To determine the correct mathematical equation to use for the problem you need to answer a few questions (organizational flow chart) about what is going on to the gas particles and their 4 parameters (V,n,T,P): 
*How many Conditions (see above for discussion)?
**1 Condition, only one equation Ideal Gas Law
**2 Conditions, how many parameters are being held constant?
***2 parameters held constant, 2 parameters vary
***1 parameters held constant (n), 3 parameters vary
 
The below information is organized using the answers to these questions (as section heading and are underlined). The discussion of each law (specific gas condition(s)) will include: 
*Name of law
*Explanation of law using Kinetic Molecular Theory (KMT or Particle View of Matter)
**Ideal Gas Law and Combined Gas Laws do not have this but have webpages of notes
*Video of Directions to perform "demo or mini-lab" (only for Boyle's, Charles' and Gay - Lussaic's Law)
*Gas Law Equation Sheet (also above) where one can find specific equation(s)
*Example of Expected work
*Youtube video of explanation of concept including expected work

<center>REMEMBER: All Temperatures used in Gas Calculations MUST BE in KELVIN (K) not Celsius or Fahrenheit!!!!!!!</center> 
 
<center>1 Condition Gas Problem (can tell if there is no action verbs in problem)</center> 
 
Ideal Gas Law 
*[[Standard Temperature and Pressure (STP)]] - reference info
*IdealGasLaws - notes
*[http://www.tmcleod.org/Level1/Chem328Gas/GasLawEquationSheet.jpg Gas Law Equation Sheet] - Find 3 Equations here (don't have one for R, it is a constant)
*[http://www.tmcleod.org/Level1/Chem328Gas/IdealGasLawExampleofWork.pdf Example of Work for Ideal Gas Law - One Problem]
*[https://www.youtube.com/watch?v=ezPU9kLPX5I&feature=youtu.be You Tube video of Expected Work for Ideal Gas Law Calculations] - If using Edpuzzle, file name: <nowiki>IdealGasLawCalculationVideo</nowiki> 
*IdealGasLawsProblemSet (answers at bottom of page)
*Schoology Quiz: Exit Ticket for Gas Problems - Ideal Gas Law 
 
<center> 2 Condition Gas Problems (See action verbs in problem, expand or decrease,etc)</center> 
 
 2 Condition Gas Problem - 2 parameters vary and 2 parameters held constant (the 3 Gas Laws and Avogadro's Hypothesis) 
 
Boyle's Law - P varies indirectly with V @const T & n (Technically one of the 3 Gas Laws) 
Particle View of Matter (KMT) explanation: if you keep the Temp,T, (energy/speed each particle has) and number of gas particles (n) the same, as you reduce the size of the container (decrease V), the particles would have to "hit the wall" more often thereby increasing total hits on wall (increase P). 
*[https://www.youtube.com/watch?v=zGRw5Geofxs You Tube Video for Directions for Boyles Law Demo] - If you are using Edpuzzle, video name is <nowiki>BoylesDemoDirectionVideo</nowiki>
*[http://www.tmcleod.org/Level1/Chem328Gas/GasLawEquationSheet.jpg Gas Law Equation Sheet] - Find 2 Equations here
*[http://www.tmcleod.org/Level1/Chem328Gas/BoyleLawExampleofWork.pdf Example of Work for Boyle's Law - One Problem]
*[https://www.youtube.com/watch?v=tmmVJ6AlavE&feature=youtu.be You Tube video on Expected Work for Boyle's Law Calculations] - If using Edpuzzle, file name: <nowiki>BoyleLawCalculationVideo</nowiki>
*BoylesLawProblemSet (answers at bottom of page)
*Schoology Quiz: Exit Ticket for Gas Problems - Boyle's Law
 
Gay - Lussaic's Law (No Name Law) - T varies directly with P @const V & n (Technically one of the 3 Gas Laws) 
*Particle View of Matter (KMT) explanation: if you keep the volume of the container the same (const V) and the number of gas particles (n) the same, as you increase the Temp,T, (energy/speed of particles), the gas particles must hit the wall more times (increase P) since "they are going faster" and the volume they have before hitting the side of container is not changing. 
*[https://www.youtube.com/watch?v=yDiwAgXMThw You Tube Video for directions for Guy-Lussaic's Law Demo] - If you are using Edpuzzle, video name is <nowiki>GuyLassaicDemoDirectionVideo</nowiki>
*[http://www.tmcleod.org/Level1/Chem328Gas/GasLawEquationSheet.jpg Gas Law Equation Sheet] - Find 2 Equations here
*[http://www.tmcleod.org/Level1/Chem328Gas/GuyLussaicLawWork.pdf Example of Work for Guy-Lussaic Law - One Problem]
*[https://www.youtube.com/watch?v=ApPGH4hdFzw&feature=youtu.be You Tube video of Expected Work for Guy-Lussaic Law Calculations] - If using Edpuzzle, file name: <nowiki>GuyLussaicLawCalculationVideo</nowiki>
*[[Guy-Lussaic' (No Name) Law Problem Set]] (answers at bottom of page)
*Schoology Quiz: Exit Ticket for Gas Problems - Gay-Lussaic Law 
Charles' Law - T varies directly with V @const P & n (Technically one of the 3 Gas Laws) 
*Particle View of Matter (KMT) explanation: if you keep the total number of hits on the wall the same (const P) and the number of gas particles (n) the same, as you increase the Temp,T, (energy/speed of particles), the volume must increases (V) since the gas particles are moving "faster/farther" and they can not hit the wall more times (const P), the volume must be greater. 
*[https://www.youtube.com/watch?v=yITJNLqNwm0&feature=youtu.be You Tube video for Directions for Charles' Law Demo] - If you are using Edpuzzle, video name is <nowiki>CharlesLawDemoDirectionVideo</nowiki>
*[http://www.tmcleod.org/Level1/Chem328Gas/GasLawEquationSheet.jpg Gas Law Equation Sheet] - Find 2 Equations here
*[http://www.tmcleod.org/Level1/Chem328Gas/CharlesLawExampleofWork.pdf Example of Work for Charles' Law - One Problem]
*[https://www.youtube.com/watch?v=J-YXEKXHOjU&feature=youtu.be You Tube video of Expected Work for Charles' Law Calculations] - If using Edpuzzle, file name: <nowiki>CharlesLawCalculationVideo</nowiki>
*CharlesLawProblemSet (answers at bottom of page)
*Schoology Quiz: Exit Ticket for Gas Problems - Charles Law
 
Avogadro's Hypothesis - V varies directly with n @const P & T (Technically NOT one of the 3 Gas Laws) 
*Particle View of Matter (KMT) explanation: If you keep total number of "hits on the wall" and the energy/speed of gas particle and add more gas particles (increase n), then you must add more volume (increase V) so that you don't change number of "hits on wall".
*Disclaimer: This is NOT actual what Avogadro hypothesized (will be covered in a different discussion) but is a function of that hypothesis 
*[http://www.tmcleod.org/Level1/Chem328Gas/GasLawEquationSheet.jpg Gas Law Equation Sheet] - Find 2 Equations here
*[http://www.tmcleod.org/Level1/Chem328Gas/AvogadroHypothesisExampleofWork.pdf Example of Work for Avogadro's Hypothesis - One Problem]
*[https://www.youtube.com/watch?v=H0PgLufo-G8&feature=youtu.be You Tube video on Expected Work on Avogadro's Hypothesis Calculations] - If using Edpuzzle, <nowiki>AvogadroHypothesisCalculationVideo</nowiki>
*AvogadrosHypothesisProblemSet (answers at bottom of page)
*Schoology Quiz: Exit Ticket for Gas Problems - Avogadro's Hypothesis 
 2 Condition Gas Problem - 3 parameters vary and n (number of moles of particle) constant 
 
Combined Gas Law - Has all 3 Gas Laws above in the equation. 
*CombinedGasLaw - notes
*[http://www.tmcleod.org/Level1/Chem328Gas/GasLawEquationSheet.jpg Gas Law Equation Sheet] - Find 3 Equations here
*[http://www.tmcleod.org/Level1/Chem328Gas/CombinedGasExpectedWork.pdf Example of Expected Work for Combined Gas Law Calculations]
*[https://www.youtube.com/watch?v=jLHbhW9BJ3Y&feature=youtu.be You Tube Video on Expected Work for Combined Gas Law Calculations] - If using Edpuzzle, <nowiki>CombinedGasLawCalculationVideo</nowiki>
*CombinedGasLawProblemSet (answers at bottom of page)
*Schoology Quiz: Exit Ticket for Gas Problems - Combined Gas Law 
Review Homework 
 
*[[Gas Law Problem Set 3]]
*[[Review Homework for Gas Problems 2]]
 
Here is a Animation/simulation to help understand Boyle's, Charle's, and Gay - Lussaic's Law 
*[https://teachchemistry.org/periodical/issues/november-2015/gas-laws Simulator for Boyle's, Charles' and Gay-Lussac Law]

View other revisions
ChemistryWiki | RecentChanges | Preferences