What is the enthalpy change for the given reaction, if enthalpies of formation of `Al_(2)O_(3)` and `Fe_(2)O_(3)` are `-"1670 kJ mol"^(-1) and -"834 kJ mol"^(-1)` respectively?
`Fe_(2)O_(3) +2Al rarr Al_(2)O_(3)+2Fe`

The enthalpies of formation of Al_(2)O_(3) and Cr_(2)O_(3) " are " -1596 kJ and -1134 kJ, respectively. DeltaH for the reaction. 2Al+Cr_(2)O_(3) rarr2Cr+Al_(2)O_(3) is

The enthalpies of formation of Al_(2)O_(3) and Cr_(2)O_(3) are -1596KJ and -1134KJ respectively. DeltaH for the reaction 2Al+Cr_(2)O_(3)rarr2Cr+Al_(2)O_(3) is

The enthalpies of formation of Al_(2)O_(3) and Cr_(2)O_(3) are -1596KJ and -1134KJ respectively. DeltaH for the reaction 2Al+Cr_(2)O_(2)rarr2Cr+Al_(2)O_(3) is

Al(s) and Fe(s) are oxidised by oxygen to form Al_(2)O_(3)(s) and Fe_(2)O_(3)(s) respectively. If the standard enthalpy of formation of Al_(2)O_(3)(s) and Fe_(2)O_(3)(s) are -1669.8 " kJ mol"^(-1) and -824.2 " kJ mol"^(-1) respectively, calculate the change in enthalpy of the given reaction : 2Al(s)+Fe_(2)O_(3)(s) to 2Fe(s)+Al_(2)O_(3)(s)

The enthalpies of formation of Al_2O_3 and Cr_2O_3 are -1596 kJ and -1134 KJ, respectively . DeltaH for reaction 2Al+Cr_2O_3 to 2Cr +Al_2O_3 is _____