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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6.75

Transcribed Image Text: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
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