The heat of a reaction, AH, may be calculated by: * 1 p A. AH =EAH -EAH, B. AH =AH Σ ΔΗ, reac tant reac tants product C. AH = AH D. ΔΗ-ΣΔΗ, xAH peactantn reac tant product O A O B O D

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Chapter1: Units And Measurement
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The heat of a reaction, AH, may be calculated by: *
1 p
Α. ΔΗ-Σ ΔΗ
products
E AH,
B. ΔΗ-Σ ΔΗ
+EAH,
reac tants
products
reac tants
c. ΔΗ-Σ ΔΗ,
-EAH
D. ΔΗ-ΣΔΗ
Σ ΔΗ,
%3D
%3D
products
reactants
reac tant
products
O A
O D
Given the following heats of formation for several compounds, determine 1p
which compound is likely to be the most stable compound. *
A. NH3(g)
AH: = -46.2 kJ/mol
B. PH3(g)
AHI = 5.4 kJ/mol
C. CO2(g)
AH: = -393.5 kJ/mol
D. NO(g)
AH: = +90.4 kJ/mol
O A
Ов
Transcribed Image Text:The heat of a reaction, AH, may be calculated by: * 1 p Α. ΔΗ-Σ ΔΗ products E AH, B. ΔΗ-Σ ΔΗ +EAH, reac tants products reac tants c. ΔΗ-Σ ΔΗ, -EAH D. ΔΗ-ΣΔΗ Σ ΔΗ, %3D %3D products reactants reac tant products O A O D Given the following heats of formation for several compounds, determine 1p which compound is likely to be the most stable compound. * A. NH3(g) AH: = -46.2 kJ/mol B. PH3(g) AHI = 5.4 kJ/mol C. CO2(g) AH: = -393.5 kJ/mol D. NO(g) AH: = +90.4 kJ/mol O A Ов
Based on the following equation what is the heat of formation, AHf", for
H2O(1) *
2 H,(g) + O,(g) → 2 H,0(1) + 136.6 kcal
-68.3 kcal
+68.3 kcal
-136.6 kcal
+136.6 kcal
The thermochemical reaction for the decomposition of nitrogen dioxide is
shown below. What is the heat of formation, AHF°, of nitrogen dioxide,
NO2(g) *
2 NO,(g) -IN,(g) + 2 O,(g) + 16.2 kcal
-16.2 kcal
O +16.2 kcal
O +8.1 kcal
O -8.1 kcal
Transcribed Image Text:Based on the following equation what is the heat of formation, AHf", for H2O(1) * 2 H,(g) + O,(g) → 2 H,0(1) + 136.6 kcal -68.3 kcal +68.3 kcal -136.6 kcal +136.6 kcal The thermochemical reaction for the decomposition of nitrogen dioxide is shown below. What is the heat of formation, AHF°, of nitrogen dioxide, NO2(g) * 2 NO,(g) -IN,(g) + 2 O,(g) + 16.2 kcal -16.2 kcal O +16.2 kcal O +8.1 kcal O -8.1 kcal
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