266 Chapter 6 Thermochemistry (a) How would y AHn value for produces about Earth. What is the dealing with enthalpies of reactions. Explain why this convention cannot be applied to nuclear reactions. Given the thermochemical equations: rxn 6.74 Br2(l) + F2(g) 2BRF(g) A 2.10-mole sam 6.82 tially at 17.0°C, then heated to 1 AH° = -188 kJ/mol %3D Br2(1) + 3F2(g) → 2BrF3(g) 1.00 atm. The AH° = –768 kJ/mol 118.1°C and is calculate the AHn for the reaction that it recrystalli rxn cess as describe Calculate the w BrF(g) + F2(8) - BrF3(g) → 6.83 6.75 The standard enthalpy change AH° for the thermal decomposition of silver nitrate according to the fol- lowing equation is +78.67 kJ: 2Na(s) + 2 when 0.34 g AgNO,(s) +02(g) gen gas at 0°C AgNO3(s) → You are giver 6.84 The standard enthalpy of formation of AgN03(s) is -123.02 kJ/mol. Calculate the standard enthalpy of formation of AgNO2(s). H2(g) - Br2(g) - Н. (g) + Br (g) Hydrazine, N,H4, decomposes according to the fol- lowing reaction: 6.76 Calculate A 4INI(6 N(g) 3N,H4(1) (a) Given that the standard enthalpy of formation of hydrazine is 50.42 kJ/mol, calculate AH° for its de- composition. (b) Both hydrazine and ammonia burn in oxygen to produce H20(1) and N2(g). Write bal- anced equations for each of these processes and calcu- late AH° for each of them. On a mass basis (per kg), would hydrazine or ammonia be the better fuel? A quantity of 2 00 x 102 mL of 0.862 M HCl is mixed A gaseous hydrogen 15.6-L gas 6.85 is burned When 2. 1 atm to 6.86 What is 87 Methan 677
266 Chapter 6 Thermochemistry (a) How would y AHn value for produces about Earth. What is the dealing with enthalpies of reactions. Explain why this convention cannot be applied to nuclear reactions. Given the thermochemical equations: rxn 6.74 Br2(l) + F2(g) 2BRF(g) A 2.10-mole sam 6.82 tially at 17.0°C, then heated to 1 AH° = -188 kJ/mol %3D Br2(1) + 3F2(g) → 2BrF3(g) 1.00 atm. The AH° = –768 kJ/mol 118.1°C and is calculate the AHn for the reaction that it recrystalli rxn cess as describe Calculate the w BrF(g) + F2(8) - BrF3(g) → 6.83 6.75 The standard enthalpy change AH° for the thermal decomposition of silver nitrate according to the fol- lowing equation is +78.67 kJ: 2Na(s) + 2 when 0.34 g AgNO,(s) +02(g) gen gas at 0°C AgNO3(s) → You are giver 6.84 The standard enthalpy of formation of AgN03(s) is -123.02 kJ/mol. Calculate the standard enthalpy of formation of AgNO2(s). H2(g) - Br2(g) - Н. (g) + Br (g) Hydrazine, N,H4, decomposes according to the fol- lowing reaction: 6.76 Calculate A 4INI(6 N(g) 3N,H4(1) (a) Given that the standard enthalpy of formation of hydrazine is 50.42 kJ/mol, calculate AH° for its de- composition. (b) Both hydrazine and ammonia burn in oxygen to produce H20(1) and N2(g). Write bal- anced equations for each of these processes and calcu- late AH° for each of them. On a mass basis (per kg), would hydrazine or ammonia be the better fuel? A quantity of 2 00 x 102 mL of 0.862 M HCl is mixed A gaseous hydrogen 15.6-L gas 6.85 is burned When 2. 1 atm to 6.86 What is 87 Methan 677
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...
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