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At constant external pressure of one atm...

At constant external pressure of one atmosphere, 4 moles of a metallic oxide `MO_2` undergoes complete decomposition at 227°C in an open vessel according to the equation
`2MO_(2) (s) to 2MO(s) + O_(2) (g)`
The work done by the system in kJ is `(R = 8.3 "kJ mol"^(-1) )`

A

`-16.6`

B

`-24.9`

C

`-8.3`

D

`-33.2`

Text Solution

Verified by Experts

The correct Answer is:
D
Work done `W=- p xx Delta V = - p xx n RT`
`= - 2 xx 4 xx 8.3 xx 500`
`= - 33200 "J" = - 33.2 "kJ"`
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