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Convert -40. kcal/mol to kJ/mol using the fact that 1kcal = 4.184 kJ. Show work using dimensional analysis. O a. 40, kcal mol 1 kcal 4.184 kJ kJ = -9.6 mol -40, kcal , 4.184 kJ mol O b. kJ -170 1 kcal mol Once we know the value of AHrxn it is possible to solve many other types of problems. For example, how many moles of zinc should we react with 6HCI to generate 120 kJ of heat? O a. 120 kJ 1 mol = 0.71 mol -170 kJ O b. 120 kJ -170 kJ = 20,000 mol 1 mol How many grams of zinc react with excess 6M HCI if 500. kJ of heat are released? Use dimensional analysis, the AHxn and the atomic mass of zinc. O a. 500. kJ 1 mol 65.39 g = 190 g Zn -170 kJ 1 mol O b. 500. kJ 1 mol 1 mol

Convert -40. kcal/mol to kJ/mol using the fact that 1kcal = 4.184 kJ. Show work using dimensional analysis. O a. 40, kcal mol 1 kcal 4.184 kJ kJ = -9.6 mol -40, kcal , 4.184 kJ mol O b. kJ -170 1 kcal mol Once we know the value of AHrxn it is possible to solve many other types of problems. For example, how many moles of zinc should we react with 6HCI to generate 120 kJ of heat? O a. 120 kJ 1 mol = 0.71 mol -170 kJ O b. 120 kJ -170 kJ = 20,000 mol 1 mol How many grams of zinc react with excess 6M HCI if 500. kJ of heat are released? Use dimensional analysis, the AHxn and the atomic mass of zinc. O a. 500. kJ 1 mol 65.39 g = 190 g Zn -170 kJ 1 mol O b. 500. kJ 1 mol 1 mol

World of Chemistry
World of Chemistry
7th Edition
ISBN:9780618562763
Author:Steven S. Zumdahl
Publisher:Steven S. Zumdahl
Chapter10: Energy
Section: Chapter Questions
Problem 47A
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Convert -40. kcal/mol to kJ/mol using the fact that 1kcal = 4.184 kJ. Show work using dimensional analysis. kcal 1 kcal 4.184 kJ kJ = -9.6 mol a. -40. mol -40. kcal mol Ob. 4.184 kJ 1 kcal kJ = -170 mol Once we know the value of AHrxn it is possible to solve many other types of problems. For example, how many moles of zinc should we react with 6HCI to generate 120 kJ of heat? О а. 120 kJ 1 mol = 0.71 mol -170 kJ O b. 120 kJ|-170 kJ 20,000 mol 1 mol How many grams of zinc react with excess 6M HCI if 500. kJ of heat are released? Use dimensional analysis, the AHrxn and the atomic mass of zinc. O a. 500. kJ 1 mol 65.39 g = 190 g Zn -170 kJ 1 mol O b. 500. kJ 1 mol 1 mol
Transcribed Image Text:Convert -40. kcal/mol to kJ/mol using the fact that 1kcal = 4.184 kJ. Show work using dimensional analysis. kcal 1 kcal 4.184 kJ kJ = -9.6 mol a. -40. mol -40. kcal mol Ob. 4.184 kJ 1 kcal kJ = -170 mol Once we know the value of AHrxn it is possible to solve many other types of problems. For example, how many moles of zinc should we react with 6HCI to generate 120 kJ of heat? О а. 120 kJ 1 mol = 0.71 mol -170 kJ O b. 120 kJ|-170 kJ 20,000 mol 1 mol How many grams of zinc react with excess 6M HCI if 500. kJ of heat are released? Use dimensional analysis, the AHrxn and the atomic mass of zinc. O a. 500. kJ 1 mol 65.39 g = 190 g Zn -170 kJ 1 mol O b. 500. kJ 1 mol 1 mol
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