Home
Class 12
CHEMISTRY
Given that C+O(2)rarrCO(2),DeltaH^(@)=-x...

Given that `C+O_(2)rarrCO_(2),DeltaH^(@)=-xKJ` and `2CO+O_(2)rarr2CO_(2),DeltaH^(@)=-yKJ` The enthalpy of formation of carbon monoxide will be

A

b-2a

B

`(2a-b)/(2)`

C

`(b-2a)/(2)`

D

2a-b

Text Solution

Verified by Experts

The correct Answer is:
C
`C + O_(2) to CO_(2), DeltaH^(@)=-aKJ`
`2CO+O_(2) to 2CO_(2) , DeltaH^(@)=-bKJ`
Formation of CO can be written as :
`C + (1)/(2)O_(2) to CO, DeltaH^(@)`= ?
Adding equation : `C+O_(2) to CO_(2) , DeltaH^(@) =-aKJ`
`CO_(2) to CO + 1/2 O_(2), DeltaH^(@)=b/2 KJ`
We get `DeltaH_(f)^(@)(CO) =b/2 -a =(b-2a)/(2)`
Promotional Banner

Topper's Solved these Questions

  • AIIMS 2000

    AIIMS PREVIOUS YEAR PAPERS|Exercise CHEMISTRY|60 Videos

  • AIIMS 2002

    AIIMS PREVIOUS YEAR PAPERS|Exercise CHEMISTRY|60 Videos

Similar Questions

Explore conceptually related problems

Given that : 2CO_((g))+O_(2(g))rarr2CO_(2(g)),DeltaH^(@)=-P kJ C_((s))+O_(2(g))rarr CO_(2(g)), DeltaH^(@)=-Q kJ the enthalpy of formation of carbon monoxide is :

Given : C("diamond")+O_(2)rarrCO_(2),DeltaH=-395 kJ C("graphite")+O_(2)rarrCO_(2),DeltaH=-393 kJ The enthalpy of formation of diamond from graphite is

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