For which of the following reactions is A; H° equal to Af H° of the product(s)? The standard heat of formation, Af H°, is defined as the enthalpy change for the You do not need to look up any values to answer this question. formation of one mole of substance from its constituent elements in their standard states. Thus, elements in their standard states have Af H° = 0. Heat of formation values can be used to calculate the enthalpy change of any reaction. Check all that apply. > View Available Hint(s) Consider, for example, the reaction 2NO(9) + O2(9)= 2NO2(g) O Li(s) + ÷F2(1)→LIF(s) with heat of formation values given by the following table: O C(s) + O2(9)→CO2(9) AH° (kJ mol-1) Substance O CO(9) + O2(9)→CO2(9) NO(9) 90.2 O2(9) O 2Li(s) + F2 (9)→2LİF(s) NO2(9) O Li(s) + ¿F2(9)→LIF(s) 33.2 O BaCO3 (s)→BaO(s) + CO2(g) Then the heat of formation for the overall reaction is Δ,ΗΣ n, Δι Η' (products) -Σ, Δ Η ' (reactants) = 2(33.2) = -114 kJ mol-1 [2(90.2) + 0]
For which of the following reactions is A; H° equal to Af H° of the product(s)? The standard heat of formation, Af H°, is defined as the enthalpy change for the You do not need to look up any values to answer this question. formation of one mole of substance from its constituent elements in their standard states. Thus, elements in their standard states have Af H° = 0. Heat of formation values can be used to calculate the enthalpy change of any reaction. Check all that apply. > View Available Hint(s) Consider, for example, the reaction 2NO(9) + O2(9)= 2NO2(g) O Li(s) + ÷F2(1)→LIF(s) with heat of formation values given by the following table: O C(s) + O2(9)→CO2(9) AH° (kJ mol-1) Substance O CO(9) + O2(9)→CO2(9) NO(9) 90.2 O2(9) O 2Li(s) + F2 (9)→2LİF(s) NO2(9) O Li(s) + ¿F2(9)→LIF(s) 33.2 O BaCO3 (s)→BaO(s) + CO2(g) Then the heat of formation for the overall reaction is Δ,ΗΣ n, Δι Η' (products) -Σ, Δ Η ' (reactants) = 2(33.2) = -114 kJ mol-1 [2(90.2) + 0]
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![For which of the following reactions is Ar H° equal to Af H° of the product(s)?
The standard heat of formation, Af H°, is defined as the enthalpy change for the
formation of one mole of substance from its constituent elements in their standard
You do not need to look up any values to answer this question.
states. Thus, elements in their standard states have Af H° = 0. Heat of
formation values can be used to calculate the enthalpy change of any reaction.
Check all that apply.
• View Available Hint(s)
Consider, for example, the reaction
2NO(9) + O2(9)
2ΝΟ (9)
O Li(s) + ¿F2(1)–→LİF(s)
with heat of formation values given by the following table:
O C(s) + O2(9)→CO2(9)
Af H°
(kJ mol-1)
Substance
O CO(9) + 02(9)→CO2(9)
NO(9)
90.2
O2 (9)
O 2Li(s) + F2 (9)–→2LİF(s)
NO2(9)
Li(s) + F2(9)→LİF(s)
33.2
O BaCO3 (s)→BaO(s) + CO2(9)
Then the heat of formation for the overall reaction is
Δ.ΗΣη, Δ Η (products ) -ΣΤ, Δ Η' (reactants)
2(33.2)
[2(90.2) + 0]
-114 kJ mol-1
=
The combustion of pentane, C5 H12, occurs via the reaction
C5H12(9) + 802(9)→5CO2(9)+ 6H2O(9)
with heat of formation values given by the following table:
Af H°
(kJ mol-1)
Substance
C5H12 (9)
-119.9
CO2 (9)
-393.5
H2O(g)
-241.8
Calculate the enthalpy for the combustion of pentane.
Express your answer to four significant figures and include the appropriate units.
• View Available Hint(s)
?
A;H° =
Value
Units
Submit](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F320eb263-4375-4f34-a4b6-3d6cfbdc0738%2F0e025d7d-642b-4fe9-aa73-c105d27d259e%2Fm4d2ciu_processed.png&w=3840&q=75)
Transcribed Image Text:For which of the following reactions is Ar H° equal to Af H° of the product(s)?
The standard heat of formation, Af H°, is defined as the enthalpy change for the
formation of one mole of substance from its constituent elements in their standard
You do not need to look up any values to answer this question.
states. Thus, elements in their standard states have Af H° = 0. Heat of
formation values can be used to calculate the enthalpy change of any reaction.
Check all that apply.
• View Available Hint(s)
Consider, for example, the reaction
2NO(9) + O2(9)
2ΝΟ (9)
O Li(s) + ¿F2(1)–→LİF(s)
with heat of formation values given by the following table:
O C(s) + O2(9)→CO2(9)
Af H°
(kJ mol-1)
Substance
O CO(9) + 02(9)→CO2(9)
NO(9)
90.2
O2 (9)
O 2Li(s) + F2 (9)–→2LİF(s)
NO2(9)
Li(s) + F2(9)→LİF(s)
33.2
O BaCO3 (s)→BaO(s) + CO2(9)
Then the heat of formation for the overall reaction is
Δ.ΗΣη, Δ Η (products ) -ΣΤ, Δ Η' (reactants)
2(33.2)
[2(90.2) + 0]
-114 kJ mol-1
=
The combustion of pentane, C5 H12, occurs via the reaction
C5H12(9) + 802(9)→5CO2(9)+ 6H2O(9)
with heat of formation values given by the following table:
Af H°
(kJ mol-1)
Substance
C5H12 (9)
-119.9
CO2 (9)
-393.5
H2O(g)
-241.8
Calculate the enthalpy for the combustion of pentane.
Express your answer to four significant figures and include the appropriate units.
• View Available Hint(s)
?
A;H° =
Value
Units
Submit
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