`Delta H_(f)^(@)` for `Al_(2)O_(3)` is -1670 KJ. Calculate the enthalpy change for the reaction `4Al+3O_(2)rarr 2Al_(2)O_(3)`

DeltaH_(f)^(@) for Al_(2)O_(3) is -1670kJ . Calculate the enthalpy change for the reaction :4Al+3O_(2) rarr 2Al_(2)O_(3) .

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

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

Balance the follwowing equations. 1) Al(OH)_(3)rarr Al_(2)O_(3)+H_(2)O

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

27 gm of Al will react completely with: 4Al + 3O_(2) rarr 2Al_(2)O_(3)