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For the gaseous reaction: 2A((g))+3B((...

For the gaseous reaction:
`2A_((g))+3B_((g)) rarr 3C_((g))+4D_((g))" at "27C, Delta H=17` kcal.
Assuming that R=2 cal `K^(-1)" mol"^(-1), Delta U` for the reaction is

A

15.8 kcal

B

16.4 kcal

C

18.2 kcal

D

20.0 kcal

Text Solution

Verified by Experts

The correct Answer is:
A
`Delta U= Delta H - Delta nRT`
`Delta n=(3+4)-(2+3)=2`
`R=2xx10^(3)` kcal
`Delta U =17-2xx2xx10^(-3)xx300=17-1.2`
`Delta U=15.8` kcals
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