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Heat of combustion of A s is − 10 kcal mol − 1 and that of − 15 kcal mol − 1 on combustion released 105 kcal of heat. What is the value of x ?

Correct answer

5.00

Step-by-step solution

ΔH total = 3 ( − 10 ) + x ( − 15 ) ⇒ − 105 = − 30 − 15 x ⇒ 15 x = 75 ∴   x = 5

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