Problem: What is the standard enthalpy of formation of CH3CH2CH2CHO(l)? 2CH3CH2CH2CHO (l) + 5O2 (g) → 8H2O (l) + 8CO2 (g):         ΔH° = -4943.6 kJ Substance             ΔH°f (kJ/mol) CO2 (g)                    - 393.5 H2O (l)                     - 285.8 Select one: a. -245.4 kJ/mol b. +245.4 kJ/mol c. -1792.5 kJ/mol d -3151.1 kJ/mol e. +3151.1 kJ/mol

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What is the standard enthalpy of formation of CH3CH2CH2CHO(l)? 

2CH3CH2CH2CHO (l) + 5O2 (g) → 8H2O (l) + 8CO(g):         ΔH° = -4943.6 kJ 

Substance             ΔH°f (kJ/mol) 

CO2 (g)                    - 393.5 

H2O (l)                     - 285.8 

Select one: 

a. -245.4 kJ/mol 

b. +245.4 kJ/mol 

c. -1792.5 kJ/mol 

d -3151.1 kJ/mol 

e. +3151.1 kJ/mol

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