`K_(p)`has the value of `10^(-6) atm^(3) and 10^(-4)atm^(3)` at 298 K and 323 K respectiely for the reaction
`CuSO_(4).3H_(2)O(s)hArrCuSO_(4)(s)+3H_(2)O(g)`
`Delta_(r)H^(@)` for the reaction is :
A. `7.7KJ//mol`
B. `-147.41KJ//mol`
C. `147.41KJ//mol`
D. none of these