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Given that , (i)CH(3)CHO+(5)/(2)O(2)to2...

Given that ,
(i)`CH_(3)CHO+(5)/(2)O_(2)to2CO_(2)+2H_(2)O,DeltaH=-1168kJmol^(-1)`
(ii)`CH_(3)COOH+2O_(2)to2CO_(2)+2H_(2)O,DeltaH=-876kJmol^(-1)`
` DeltaH` for the reaction ,
`CH_(2)CHO+(1)/(2)O_(2)toCH_(3)COOH`,is

A

`29^(2) kJ mol^(-1)`

B

`378 kJ mol^(-1)`

C

`195 kJ mol^(-1)`

D

`2044 kJ mol^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
A
(i)`CH_(3)CHO+(5)/(2)O_(2)to2CO_(2)+2H_(2)O,"DeltaH=-1168kJmol^(-1)`
`CH_(3)COoH+2O_(2)to2CO_(2)+2H_(2)O,DeltaH=-876kJ mol^(-1)`
Reverse equation (ii) and then add equation (i) and (ii)
`CH_(3)CHO+(5)/(2)O_(2)to2CO_(2)+2H_(2)O,"DeltaH=-1168kJmol^(-1)`
`underline (2CO_(2)+2H_(2)O)toCH_(3)COOH+2O_(2),Delta=+876kJ mol^(-1)`
`CH_(3)CHO+(1)/(2)O_(2)toCH_(2)COOH,""""DeltaH=-292 kJ mol ^(-1)`
`thereforeDeltaH=-292kJ/Jmol`
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