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Heat of formation of H(2)O(g) at 1 atm a...

Heat of formation of `H_(2)O(g)` at 1 atm and `25^(@)C` is
`-243KJ` . `DeltaE` for the reaction `H_(2)(g)+30JK^(-1)mol^(-1)(1)/(2)`
`O(g)rarrH_(2)O(g)` at `25^(@)C` is

A

`241.8KJ`

B

`-241.8KJ`

C

`-243KJ`

D

`243KJ`

Text Solution

Verified by Experts

The correct Answer is:
C
`DeltaH=DeltaE+DeltanRT`
`Deltan=-1//2`
`:. -43=DeltaE+(-1//2)xx8.314xx298xx10^(-3)`
`:. DeltaE=-241.76`
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A2Z-CHEMICAL THERMODYNAMICS-Section D - Chapter End Test
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