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The heat evolved from the combustion of ...

The heat evolved from the combustion of carbon is used to heat water. Assuming `50%` efficiency, calculate mole of water vaporized at its boiling point `Delta H_(f)=(CO_(2))=-94K cal//mol` and `DeltaH_(vap)(H_(2)O)=9.6kcal //mol)` and `6g C` is undergoing combustion

A

`1.21`mole

B

2.42 mole

C

4.89 mole

D

9.7 mole

Text Solution

Verified by Experts

The correct Answer is:
2
`C+O_(2)rarr CO_(2)`
`(1)/(2)mol" "(1)/(2)mol`
`DeltaH=(94)/(2)Kcalxx(50)/(100)=(47)/(2)Kcal=q`
`n_(H_(2)O)xx9.6=(47)/(2)`
`n_(H_(2)O)=(47)/(2xx9.6)=2.42mol e`
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