Charlamagne. LL Coc x V f Messenger xV Math 124 Google Drive Math 124-Google Dri
ID: 476051 • Letter: C
Question
Charlamagne. LL Coc x V f Messenger xV Math 124 Google Drive Math 124-Google Drive x As. CHEM 122 Lab x C Chegg Study Guided S www.saplinglearning.com/ biscms/mod/ibis/view.php?id 3178575 my Western Home Raymond Mbif f Raymond Mbitngwe Home 880 News Sapling ning IEn PlayStation Offic N Wrestling News Home-FAFSA on th- Other bookmarks My Assignment Resources 1/25/2017 11:55 PM A Gradebook O Assignment Information Attempts Print Calculator Periodic Table Available From: 8/2017 08:55 AM Question 2 of 3 Due Date: 1/25/2017 11:55 PM Map Sapling Learning this question hasbeen curtomimdby Points Possible 5 Grade Category: Formula of a Complex Ion You carry out a reaction with2.96 g of calcium oxide, which produces 3360 J of heat. What is AHion, the change in enthalpy, in kJimol Dan, for the reaction shown? Description: Pre-Lab Assignment. Due Before Lab Policies: WWU Pre-Lab Policy Be sure to include the correct sign for your answer using the selection box provided. You can check your answers. sign magnitude Yo can view solutions after the due date. You have three attempts per question. kJ mol rxn You lose 20% of the points available to each answer in your question for each incorrect attempt at that answer. For multiple-choice questions, the penalty depends on the number of choices available. eTextbook OHelp With This Topic O Web Help & Videos A Previous Check Answer Next Exi O O Technical Support and Bug ReportsExplanation / Answer
Number of moles of calcium oxide = 2.96 g / 56.0774 g.mol-1 = 0.0528 mole
from the balanced equation we can say that
1 mole of CaO produces 3360 J of heat so
0.0528 mole of CaO will produce
= 0.0528 mole of CaO *(3360 J of heat/1 mole of CaO)
= 177.41 J of heat will be released.
The correct sign is negative (-) as the heat is released in this reaction.