Answer to Question #161354 in General Chemistry for neyola rebello

Question #161354

Calculate the standard heat of formation of acetaldehyde, ΔH°(CH3CHO), given the following information:

CH3CHO(g) + 5/2 O2(g) → 2 CO2(g) + 2 H2O(l)     ΔH° = -1194 kJ

ΔH°f of CO2(g) = -394 kJ/mol

ΔH°f of H2O(l) = -286 kJ/mol

Hint: use the Hess's Law equation to calculate heat of formation of CH3CHO

-332 kJ

-166 kJ

+332 kJ

+166 kJ



1
Expert's answer
2021-02-09T03:37:40-0500
"\\Delta H (CH_3CHO) = 2*(-394)+2*(-286)+1194 = -166"

Answer: -166


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