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X gm of ethanal was subjected to combust...

X gm of ethanal was subjected to combustion in a bomb calorimeter and the heat produced is Y joules. Then

A

`Delta E_(("combustion"))=-XJ`

B

`Delta E_(("combustion"))= -YJ`

C

`Delta E_(("combustion"))= -(44Y)/(X)"J mol"^(-1)`

D

`Delta H_(("combustion"))= -(44Y)/(X)"J mol"^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
C
Heat of combustion is determined for 1 mole substane. In Bomb calorimeter heat of reaction `= Delta E`
`Xg CH_(3)CHO` produces Y Joule heat
`therefore` 1 mole `=44 g CH_(3)CHO` will produce
`(Y)/(X)xx44` Joule heat
`Delta E=(-44Y)/(X)J mol^(-1)`
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