1.

For the reaction : C_(3)H_(8)(g) + 5O_(2) rarr 3CO_(2)(g) + 4H_(2)O(l) a constant temperature, Delta H - Delta U is

Answer»

`+ RT`
`- 3RT`
`+ 3RT`
`- RT`

SOLUTION :`DELTA n_(g) = n_(p) - n_(r) = 3 - 6 = - 3`
`Delta H = Delta U + Delta n_(g) RT`
`Delta H - Delta U = - 3RT`


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