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Ethyl chloride (C(2)H(5)Cl) , is prepare...

Ethyl chloride `(C_(2)H_(5)Cl)` , is prepared by reaction of ethylene with hydrogen chloride`:`
`C_(2)H_(4)(g)+HCl(g) rarr C_(2)H_(5)Cl(g)`
`DeltaH=-72.3kJ//mol`
What is the value of `DeltaE (` in `kJ)`, if `98g` of ethylene and `109.5g` of `HCl` are allowed to react at `300K`

A

`-64.81`

B

`-190.71`

C

`-209.41`

D

`-224.38`

Text Solution

Verified by Experts

The correct Answer is:
C
`Deltan_(g) = 1-2=-1`
`DeltaE = DeltaH -Deltan_(g)RT = DeltaH-RT = -72.3 + 8.314 xx 300 xx 10^(-3) = -69.806 kJ//"mol"`
So for 3 mole we will get `DeltaE = -69.806 xx 3kJ//"mole" = -209.42 kJ//mol`
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