When one mole of A is reacted completely in an ice calorimeter at `0^(@)`C and at 1 atm, it is found that the volume of equlibrium mixture of ice and water decreased by `0.25 Ml.` The `Delta _(r)H_(273)` "for the reaction" `2Ararr B +2C`
is : (the densities of water and icfe at `0^(@)` and 1 atm are 1.00 and 0.96 `gm//cm^(3)`, respectively and latent hete of fusion of ice at `0^(@)` C and 1 atm is 80cal//gm) [Use:`1ifDelta_(r)H_(273` is+ ve and `2if Delta _(r)H_(273` is -ve and answer as a abc or 2abc, where abc is magnitude of ` Delta _(r)H_273`]
