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The heats of combustion of carbon and ca...

The heats of combustion of carbon and carbon monoxide are -393.5 and `-283.5 kJ "mol"^(-1)` respectively. The heat of formation (in kJ) of carbon monoxide per mole is

A

`110.5`

B

`676.5`

C

`-676.5`

D

`-110.5`

Text Solution

Verified by Experts

The correct Answer is:
D
(i) `C(s) +O_(2)(g) to CO_(2)(g) DeltaH = -393.5 kJ "mol"^(-1)`
(ii) `CO(g) + 1/2 O_(2)(g) to CO_(2)(g) DeltaH = -283.5 kJ "mol"^(-1)`
Subtracting equation (ii) from equation (i)
`C(s) + 1/2O_(2)(g) to CO(g) = - 110.0 kJ "mol"^(-1)`.
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Knowledge Check

  • The heats of combustion of carbon and carbon monoxide are 393.5 and -283.5kJ"mol"^(-1) , respectively. The heat of formation (in kJ) of carbon monoxide per mole is

    A
    `-676.5`
    B
    `-110.5`
    C
    `110.5`
    D
    `676.5`

  • The heats of combustion of carbon and carbon monoxide are -393.5and-283.5kJmol^(-1) respectively. The heat of formation (in kJ) of carbon monoxide per mole is:

    A
    676.5
    B
    -676.5
    C
    -110.5
    D
    110.5

  • The enthalpies of combustion of carbon and carbon monoxide are -393.5 and -283 kJ mol^(-1) respectively. The enthalpy of formation of carbon monoxide per mole is

    A
    110.5 kJ
    B
    676.5 kJ
    C
    `-676.5 kJ`
    D
    `-110.5 kJ`

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