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9. Given 2Als) + 3/2 O2(g) → Al2O3(s) AH = -1670 kJ What is AH for the reaction? 2Al2O3(s) → 4Al(s) + 302(g) AH= ? a. 3340 kJ b. 1670 kJ c. -3340 kJ d. -1670 kJ e. -835 kJ

9. Given 2Als) + 3/2 O2(g) → Al2O3(s) AH = -1670 kJ What is AH for the reaction? 2Al2O3(s) → 4Al(s) + 302(g) AH= ? a. 3340 kJ b. 1670 kJ c. -3340 kJ d. -1670 kJ e. -835 kJ

Chemistry for Engineering Students
Chemistry for Engineering Students
4th Edition
ISBN:9781337398909
Author:Lawrence S. Brown, Tom Holme
Publisher:Lawrence S. Brown, Tom Holme
Chapter5: Gases
Section: Chapter Questions
Problem 5.110PAE
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9. Given 2Al (s) +3/2 O 2(g) Al 2 O 3(s); Delta*H = - 1670kJ What is Delta*H for the reaction? 2Al 2 O 3(s) 4Al (s) +3O 2(g) Delta H= ? a . 3340 kJ b. 1670 kJ -3340 kJ d . -1670 kJ e . - 835kJ 10. If 10.0 ml of (aq) and 10.0 ml of NaOH(aq) are combined in calorimeter and the temperature of the solution increases, which of the following is correct. a. g cal is positive and q rxr is negative. b. q cal is negative and qrxn is positive. . q cal and are positive. d. q cal and are negative .
9. Given 2A16) + 3/2 O2(g) → Al2O3(s) AH = -1670 kJ What is AH for the reaction? 2A½O3(s) → 4Al(s) + 302(g) AH = ? a. 3340 kJ b. 1670 kJ c. -3340 kJ d. -1670 kJ e. -835 kJ 10. If 10.0 ml of HCl (aq) and 10.0 ml of NaOH(aq) are combined in calorimeter and the temperature of the solution increases, which of the following is correct. a. qçal is positive and qrxn is negative. b. qcal is negative and qrxn is positive. c. qçal and qrxn are positive. d. qcal and qrxn are negative. ADLE
Transcribed Image Text:9. Given 2A16) + 3/2 O2(g) → Al2O3(s) AH = -1670 kJ What is AH for the reaction? 2A½O3(s) → 4Al(s) + 302(g) AH = ? a. 3340 kJ b. 1670 kJ c. -3340 kJ d. -1670 kJ e. -835 kJ 10. If 10.0 ml of HCl (aq) and 10.0 ml of NaOH(aq) are combined in calorimeter and the temperature of the solution increases, which of the following is correct. a. qçal is positive and qrxn is negative. b. qcal is negative and qrxn is positive. c. qçal and qrxn are positive. d. qcal and qrxn are negative. ADLE
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