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Heat of combustion of A(s) is -10 k"cal"...

Heat of combustion of A(s) is `-10 k"cal" mol^(-1)` and that of B(s) is `-15` Kcal `mol^(-1)`. Mixture containing 3 moles A(s) and x moles B(s) on combustion released 105 kcal of heat. What is the value of x?

Text Solution

Verified by Experts

The correct Answer is:
5
`A + O_(2) rarr Delta H_(1) = -10` Kcal
`B + O_(2) rarr Delta H_(2) = -15` Kcal
`3A xx xB = 10^(5)`
`rArr 3(10) + x (15) = 10^(5) rARr x = 5`
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