The value of `Delta_r G` for formation of `Cr_2 O_3` is `-540 kJmol^-1` and that of `AI_(2)O_(3)` is `-827 kJ mol^(-1)`.Is the reduction of `Cr_2 O_3` possible with Al?

When compared to the 'Delta G^circ' for the formation of 'Al_2 O_3', the 'Delta G^circ' for the formation of 'Cr_2 O_3' is Same unpredicted higher lower

The enthalpy of hydration of Cr^(2+) is -460 kcal mol^(-1) . In the absence of CFSE, the value for DeltaH = - 424 kcal mol^(-1) . What is the value of Delta_0 for [Cr(H_2O)_6]^(2+)

The standard enthalpies of formation of H_(2)O(l) and CO_(2)(g) are respectively -286" kJ mol"^(-1) and -394" kJ mol"^(-1) . If the standard heat of combustion of CH_(4)(g)" is "-891" kJ mol"^(-1) , then the standard enthalpy of formation of CH_(4)(g) is

Rate of formation of SO_(3) in the following reaction 2SO_(2) + O_(2) to 2SO_(3) is 100g "min"^(-1) . Hence rate of disappearance of O_(2) is: