×

### Let's log you in.

or

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

×

or

16

0

2

# Class Note for CHEM 122 at UMass(37)

Marketplace > University of Massachusetts > Class Note for CHEM 122 at UMass 37

No professor available

These notes were just uploaded, and will be ready to view shortly.

Either way, we'll remind you when they're ready :)

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

×
Unlock Preview

COURSE
PROF.
No professor available
TYPE
Class Notes
PAGES
2
WORDS
KARMA
25 ?

## Popular in Department

This 2 page Class Notes was uploaded by an elite notetaker on Friday February 6, 2015. The Class Notes belongs to a course at University of Massachusetts taught by a professor in Fall. Since its upload, it has received 16 views.

×

## Reviews for Class Note for CHEM 122 at UMass(37)

×

×

### 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: 02/06/15
Chapter 9 Lecture Worksheet 4 1quot Summarize the ICE Method H Write the Balanced Chemical Equation always start with this for any equilibrium calculation I Write the Initial Concentrations under each substance may be in units of M or partial pressures for gases Write the Change in Concentrations in terms of x molesL of reactantlost Write the Equilibrium Concentrations in terms of initial concs and x Put into K expression equation relating K to equilibrium concentrations Calulate K or S olve for x Depends on what you are looking for Is your answer physically reasonable 7 aweww Check 1 Check approximation or exact calculation 2 The equilibrium constant KC for the following reaction is 59 x 10 3 at 250C Suppose 034 moles of N204 g are placed in a 100 L ask What is the equilibrium concentration of N02 g You must use the ICE method to solve this problem N204g 2 N02g Initial 034 M 0 Change x 2x Equilibrium 034 x 2x N02g2 202 C 59 x10 3 N204g 034 x This is a quadratic equation Put into form ax2 bx c 0 4x2 ch K4034 0 X b i V122 4ac KC WtKCZ 44 KC034 2a 24 59x10 3 i 159x10 32 1659x10393034 8 X 212X10 2 phycically unreasonable or 217X10 2 M correct answer N02 2 2X 00434 2 0043 M Check use 3 sig gs 202 004342 00059 to two significant figures Check 034 x 034 00217 3 The principle industrial source of hydrogen gas is from natural gas and water Via a two step process 1 Reforming Reaction CH4g H20g C0g 3 H2g 2 Shift reactions COg H20g x C02g H2g CH I Reforming Synthesis gas reaction 1 C0 3 H3 CO absorber reaction 2003 ThumsumBrooksCale 4 H2 The equilibrium constant KP for the first reaction is 18 X 10 7 at 600 K Suppose 140 atm of CH4g and 230 atm of H20g are placed in a reaction chamber What Will the equilibrium partial pressure of H2g be after the first reaction You must use the ICE method to solve this problem CH4g H20g x C0g 3H2g Initial 140 atm 230 atm 0 0 Change X 1 3x Equilibrium 140 X 230 X X 3X P P 3 3 4 C0 H2 3 0 27quot 18X10 7 PCH4PH20 140 x230 x 140 x230 x This is a QUARTIC equation Can39t put into simple form to solve APPROXIMATE KP ltlt 1 Reactant favored Therefore X is SMALL BIG NUMBER SMALL NUMBER z BIG NUMBER Kp eXpression simplifies 27x4 1 40230 140 230 K X 4 1I4 215x10398 121X10 2 12 X10 2 atm KP 18x10397 z CHECK Substitute in X see if get correcth 27121x103924 18X10 7 140 121x10392230 121x10392 Not Bad for an apprOXimate answer Sure simpifies the mathematics H We Will use this technique frequently for Acid Base calculations

×

×

### 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

Steve Martinelli UC Los Angeles

#### "There's no way I would have passed my Organic Chemistry class this semester without the notes and study guides I got from StudySoup."

Janice Dongeun University of Washington

#### "I used the money I made selling my notes & study guides to pay for spring break in Olympia, Washington...which was Sweet!"

Jim McGreen Ohio University

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