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
9th Edition
ISBN:9781133611097
Author:Steven S. Zumdahl
Publisher:Steven S. Zumdahl
Chapter17: Spontaneity, Entropy, And Free Energy
Section: Chapter Questions
Problem 55E: For the reaction at 298 K, 2NO2(g)N2O4(g) the values of H and S are 58.03 kJ and 176.6 J/K,...
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:
9781133611097
Author:
Steven S. Zumdahl
Publisher:
Cengage Learning
Chemistry: An Atoms First Approach
Chemistry: An Atoms First Approach
Chemistry
ISBN:
9781305079243
Author:
Steven S. Zumdahl, Susan A. Zumdahl
Publisher:
Cengage Learning
Chemistry
Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
Chemistry
ISBN:
9781337399074
Author:
John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:
Cengage Learning
Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
Chemistry
ISBN:
9781133949640
Author:
John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:
Cengage Learning
Chemistry for Engineering Students
Chemistry for Engineering Students
Chemistry
ISBN:
9781337398909
Author:
Lawrence S. Brown, Tom Holme
Publisher:
Cengage Learning
SEE MORE TEXTBOOKS