1.

Enthalpy of combustion of C_(6) H_(6) (l) is - 3264. 64 kj/ mol . The heat produced by burning 3. 9 g of benzene is

Answer»

`-163.23 KJ`
`` 326 . 4 kJ
` 32.64 kJ`
`-3.254 kJ`

Solution :since , heat evolved when 78 g BENZENE is BURNT
`=-3264.6 kJ`
therefore, heat produced , by buring 3.9 g benzence
`3.9/78xx(-3264.6)=-163.23 kJ`


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