×

### Let's log you in.

or

Don't have a StudySoup account? Create one here!

×

or

8

1

4

# Chapter 5 Overall Notes CHEM 1307

Marketplace > Texas Tech University > Chemistry > CHEM 1307 > Chapter 5 Overall Notes
TTU

Get a free preview of these Notes, just enter your email below.

×
Unlock Preview

Chapter 5 notes needed for upcoming Test 2 next week on OCT 20th
COURSE
PROF.
Tamara Hanna
TYPE
Class Notes
PAGES
4
WORDS
CONCEPTS
Chemistry
KARMA
25 ?

## Popular in Chemistry

This 4 page Class Notes was uploaded by Kyle A. Headen on Tuesday October 11, 2016. The Class Notes belongs to CHEM 1307 at Texas Tech University taught by Tamara Hanna in Fall. Since its upload, it has received 8 views. For similar materials see /class/226511/chem-1307-texas-tech-university in Chemistry at Texas Tech University.

×

## Reviews for Chapter 5 Overall Notes

×

×

### What is Karma?

#### You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!

Date Created: 10/11/16
Chapter 5  Pressure: The United States National Institute of Standards and Technology uses one atmosphere as the standard pressure. Pressure is force per unit area. The S. I. unit of force is the newton. Force = mass x acceleration 1 newton = 1 kg m s-2 The S. I. unit of pressure is the pascal. 1 pascal (Pa) = 1 newton / meter2 1 pascal = 1 kg m s-2m-2 = 1 kg s-2m-1 1 bar = 1 x 105 pascals (Pa) 1 bar = 100 kilopascals (kPa) 1 bar = 1 x 105 kg s-2m-1 1 bar = 0.9872 atmospheres 1 atmosphere = 760 mm Hg = 760 torr 1 atmosphere = 14.6960 pounds per square inch 1 atmosphere = 1.01325 bar 1 atmosphere = 1.01325 x 10^5pascals Memorize the following conversion factor: 1 atmosphere = 760 mm Hg = 760 torr  General Gas Law: P1V1/(T1) = P2V2/(T2) This equation can be used for any problem in which the amount (number of moles) of gas stays the same. If any variable (P, V, or T) stays the same, it can be cancelled from both sides, and the equation is then reduced to Boyle’s, Charles’s, or Gay-Lussac’s Law. P V = n R T R is the ideal gas constant. R = 0.082057 L atm K-1mol-1 R = 8.314472 J K-1mol-1 Note that Liters x atmospheres (V x P) are units of energy in the form of work.  PV Work: Work is done when a gas undergoes a volume change at constant pressure. Work = P*Delta V Pressure is force per unit area. Force = mass x acceleration = (kg) (m s-2) Pressure = force / area = (kg m s-2) / m2 = kg m-1 s-2 Pressure x Volume = (kg m-1 s-2) (m3) = kg m2 s-2 Work = Force x displacement = (kg m s-2) (m) = kg m2 s-2 Remember that kg m2 s-2 are units of energy (Joules). Compare to the formula for kinetic energy: Kinetic Energy = ½ m v2 Energy units are kg (m s-1)2 = kg m2 s-2= 1 Joule  Standard Condition: Many physical properties of gases are listedin tables of data. In order to be able to compare values for different gases,the values are given for gases that are at the same temperature and pressure. Standard temperature for gases is 0oC (273.15 K) Standard pressure for gases is 1atm.  Gas Densityand Molar Mass: n (# of moles) = (mass) / (molar mass) ‘P V = n R T P V = (m / M) R T This equation can be used to determine the molar mass (M) of a gas if the pressure, volume, P V = (m / M) R Tture are known. The equation can be rearranged to show the relationship between the density of a gas and the other variables. density= m = ( )( ) V R T ( )( ) To calculate Molar Mass: P M density= m = ( )( ) V ( )( ) (m)(R)(T) density R (T) M   (V)(P) P  Gas Mixtures and Partial Pressures: In a mixture of ideal gases there is no force of attraction between any of the gas molecules. Each gas in the mixture behaves independently of all the others and obeys the ideal gas law. PA = nA PB = nB R T / V; etc.A, B, C,… in a container of volume V: The total pressure of the gas mixture is equal to the sum of all of the “partial pressures” of the components (A, B, C, …) in the mixture. Ptotal = PA + PB + PC + … Since PA = nA R T / V; PB = nB R T / V; etc. Ptotal = PA + PB + PC + … Ptotal = (nA + nB + nC + …) (R T / V) Ptotal = (ntotal) (R T / V) The mole fraction of each gas in the mixture is the number of moles of that gas divided by the total number of moles of all of the gases in the mixture. XA = nA / (nA + nB + nC + …) = nA / ntotal nA = (XA) (ntotal) The partial pressure of gas A is therefore: PA = XA Ptotal  The Kinetic-Molecular Theory of Gases: kinetic energy = ½ m u2 where u is the speed of the molecule. average kinetic energy = ½ m ù2 where ù2 is the average of the squares of the speeds of the molecules. From experiment, it is known that: average kinetic energy = (3/2) R T When using this formula, make sure that R has units of energy (joules). R = 8.314472 J K-1mol-1

×

×

### BOOM! Enjoy Your Free Notes!

×

Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'

## Why people love StudySoup

Bentley McCaw University of Florida

#### "I was shooting for a perfect 4.0 GPA this semester. Having StudySoup as a study aid was critical to helping me achieve my goal...and I nailed it!"

Jennifer McGill UCSF Med School

#### "Selling my MCAT study guides and notes has been a great source of side revenue while I'm in school. Some months I'm making over \$500! Plus, it makes me happy knowing that I'm helping future med students with their MCAT."

Bentley McCaw University of Florida

Forbes

#### "Their 'Elite Notetakers' are making over \$1,200/month in sales by creating high quality content that helps their classmates in a time of need."

Become an Elite Notetaker and start selling your notes online!
×

### Refund Policy

#### STUDYSOUP CANCELLATION POLICY

All subscriptions to StudySoup are paid in full at the time of subscribing. To change your credit card information or to cancel your subscription, go to "Edit Settings". All credit card information will be available there. If you should decide to cancel your subscription, it will continue to be valid until the next payment period, as all payments for the current period were made in advance. For special circumstances, please email support@studysoup.com

#### STUDYSOUP REFUND POLICY

StudySoup has more than 1 million course-specific study resources to help students study smarter. If you’re having trouble finding what you’re looking for, our customer support team can help you find what you need! Feel free to contact them here: support@studysoup.com

Recurring Subscriptions: If you have canceled your recurring subscription on the day of renewal and have not downloaded any documents, you may request a refund by submitting an email to support@studysoup.com