If `(1)/(2)X_(2)O_((s)) rarr X_((s))+(1)/(4)O_(2(g)),DeltaH=90kJ` then heat change during reaction of metal `X` with `1 mol e O_(2)` to form oxide to maximum extent is `:`

If (1)/(2) X _(2) O _((s)) to X _(s) + (1)/(4) O _(2( g)) Delta H = 90 KJ then heat exchange during reaction of metal X with one mole of O_(2) to form oxide to maximum extent is

M is a metal which forms an oxide, M_(2)O and (1)/(2) M_(2)O(s) rarr M(s) + (1)/(4) O_(2)(g), Delta H = 90 kJ mol^(-1) When a sample of the metal M reacts with 1 mole of O_(2)(g) to form M_(2)O , DeltaH for the reaction is :

The enthalpy changes for two reactions are given by the equations: 2Cr(s) +(3)/(2)O_(2)(g) rarr Cr_(2)O_(3)(s), DeltaH^(Theta) =- 1130 kJ C(s) +(1)/(2)O_(2)(g)rarr CO(g), DeltaH^(Theta) =- 110 kJ What is the enthalpy change in kJ for the following reactions? 3C(s) +Cr_(2)O_(3)(s) rarr 2Cr(s) +3CO(g)

The thermochemical equation for solid and liquid rocket fuel are given below: 2AI(s) +1(1)/(2)O_(2)(g) rarr AI_(2)O_(3)(s), DeltaH =- 1667.8 kJ H_(2)(g) +(1)/(2)O_(2)(g) rarr H_(2)O(l), DeltaH =- 285.9 kJ a. If equal masses of aluminium and hydrogen are used, which is a better rocket fuel? b. Determine DeltaH for the reaction AI_(2)O_(3)(s) rarr 2AI(s)+1(1)/(2)O_(2)(g)

The thermochemical equation for solid and liquid rocket fuel are given below: 2AI(s) +1(1)/(2)O_(2)(g) rarr AI_(2)O_(3)(s), DeltaH =- 1667.8 kJ H_(2)(g) +(1)/(2)O_(2)(g) rarr H_(2)O(l), DeltaH =- 285.9 kJ a. If equal masses of aluminium and hydrogen are used, which is a better rocket fuel? b. Determine DeltaH for the reaction AI_(2)O_(3)(s) rarr 2AI(s)+1(1)/(2)O_(2)(g)

Given that O(g) + e^(-) rarr O^(-)(g) Delta H = - 142 kJ mol^(-1) O(g) + 2e^(-) rarr O^(2-)(g) DeltaH =+712kJmol^(-1) The heat change for the reaction O^(-)(g) + e^(-) rarr O^(2-)(g) is :

The enthalpy changes for two reactions are given by the equations: 2Cr(s) +(3)/(2)O_(2)(g) rarr Cr_(2)O_(3)(s), DeltaH^(Theta) =- 1130 kJ C(s) +(1)/(2)O_(2)(g)rarr CO_(2)(g), DeltaH^(Theta) =- 110 kJ What is the enthalpy change in kJ for the following reactions? 3C(s) +Cr_(2)O_(3)(s) rarr 2Cr(s) +3CO(g)

For the reaction, Ag_(2)O_((s)) hArr 2Ag_((s)) + (1)/(2) O_(2(g)) Delta H, Delta S and T are 40.63 kJ mol^(-1), 108.8 JK^(-1) mol^(-1) and 373K respectively. Free energy change Delta G of the reaction will be _____