Homework Help is Here – Start Your Trial Now!
Science
Chemistry
Find ∆Hf for Al2O3 using the following data   2 Al  +  3/2 O2  ---->  Al2O3          H2  +  ½ O2  ------------>  H2O           ∆H1 = –286 kJ/mol          2 Al + 6 H+  ------------->  2 Al3+  +  3 H2 ∆H2 = –1050 kJ/mol          Al2O3  +  6 H+  ----------->  2 Al3+   +  3 H2O ∆H3 = –238 kJ/mol NOTE: I calculated #5 to be ∆Hf =-1670 kJ/mol.  6. Using the value calculated in #5, find the temperature change expected when 0.100 g Al reacts with oxygen if the calorimeter used has a heat capacity of 420 J/°C.

Find ∆Hf for Al2O3 using the following data   2 Al  +  3/2 O2  ---->  Al2O3          H2  +  ½ O2  ------------>  H2O           ∆H1 = –286 kJ/mol          2 Al + 6 H+  ------------->  2 Al3+  +  3 H2 ∆H2 = –1050 kJ/mol          Al2O3  +  6 H+  ----------->  2 Al3+   +  3 H2O ∆H3 = –238 kJ/mol NOTE: I calculated #5 to be ∆Hf =-1670 kJ/mol.  6. Using the value calculated in #5, find the temperature change expected when 0.100 g Al reacts with oxygen if the calorimeter used has a heat capacity of 420 J/°C.

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
See similar textbooks
icon
Related questions
Question

1. Find ∆Hf for Al2O3 using the following data   2 Al  +  3/2 O2  ---->  Al2O3
         H2  +  ½ O2  ------------>  H2O           ∆H1 = –286 kJ/mol

         2 Al + 6 H+  ------------->  2 Al3+  +  3 H2 ∆H2 = –1050 kJ/mol

         Al2O3  +  6 H+  ----------->  2 Al3+   +  3 H2O ∆H3 = –238 kJ/mol

NOTE: I calculated #5 to be ∆Hf =-1670 kJ/mol. 

6. Using the value calculated in #5, find the temperature change expected when 0.100 g Al reacts with oxygen if the calorimeter used has a heat capacity of 420 J/°C.

Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 3 steps

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Thermodynamics
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Chemistry
Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
Chemistry
Chemistry
Chemistry
ISBN:
9781259911156
Author:
Raymond Chang Dr., Jason Overby Professor
Publisher:
McGraw-Hill Education
Principles of Instrumental Analysis
Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning
Organic Chemistry
Organic Chemistry
Chemistry
ISBN:
9780078021558
Author:
Janice Gorzynski Smith Dr.
Publisher:
McGraw-Hill Education
Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
Chemistry
ISBN:
9781305079373
Author:
William L. Masterton, Cecile N. Hurley
Publisher:
Cengage Learning
Elementary Principles of Chemical Processes, Bind…
Elementary Principles of Chemical Processes, Bind…
Chemistry
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
SEE MORE TEXTBOOKS