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CGP EDU Academic Team
Published on: August 14, 2026
The heat of combustion of ethyl alcohol is –300 kcal. If the heats of formation of CO 2 (g) and H 2 O( λ ) are –94.3 and –68.5 kcal respectively, calculate the heat of formation of ethyl alcohol.
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
(–94.1 kcal)
C 2 H 6 O + 3O 2 (g) ⎯→ 2CO 2 + 3H 2 O. Δ H = – 300 kcal
Δ H comb = 
+ 
– 
⇒ 
= 2(–94.3) + 3(–68.5) + 300 = –94.1 Kcal
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