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For the reaction, 2CO + O(2) to 2CO(2), ...

For the reaction, `2CO + O_(2) to 2CO_(2), DeltaH = -560 kJ`. Two moles of CO and one mole of `O_(2)` are taken in a container of volume 1 L. They completely form two moles of `CO_(2)`, the gases deviate appreciably from ideal behaviour. If the pressure in the vessel changes from 70 to 40 atm, find the magnitude (absolute value) of `DeltaU` at 500 K.

A

563

B

575

C

585

D

595

Text Solution

Verified by Experts

The correct Answer is:
A
`DeltaH = DeltaU + Delta(PV)`
`DeltaH = DeltaU + V DeltaP`
`Delta U = DeltaH - V Delta P = - 560 - 1 xx 30 xx 0.1`
Absolute value ` = 563 kJ`.
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