Home
Class 11
CHEMISTRY
If (1)/(2)X(2)O((s)) rarr X((s))+(1)/(4)...

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 `:`

A

`-360KJ`

B

`-180KJ`

C

`+360KJ`

D

`+180KJ`

Text Solution

Verified by Experts

The correct Answer is:
A
`(1)/(4)` mole of `O_(2)rarr90` KJ
1 mole `rarr`?
Promotional Banner

Similar Questions

Explore conceptually related problems

If C(s)+O_(2)(g)rarrCO_(2)(g),DeltaH=X and CO(g)+1//2O_(2)(g)rarrCO_(2)(g),DeltaH=Y , then the heat of formation of CO is

H_(2)O(s) rarr H_(2)O(l), DeltaH = 6.01 kJ DeltaH is the heat of …………………of ice.

H_(2)O(l) rarr H_(2)O(s), DeltaH =- 6.01 kJ DeltaH is the heat of ……………….of water.

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 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)

If 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 Calculate DeltaH for the reaction AI_(2)O_(3)(s) rarr 2AI(s) +1(1)/(2)O_(2)(g)

The equations representing the combustion of carbon and carbon monoxide are : C(s) + O_(2)(g) to CO_(2)(g) DeltaH = -394 (kJ)/(mol) CO(s) + 1/2 O_(2)(g) to CO_(2)(g) DeltaH = -284.5 (kJ)/(mol) the heat of formation of 1 mol of CO(g) is :