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If the enthalpy of combustion of C(graph...

If the enthalpy of combustion of `C`(graphite) is `-393.3kJ mol^(-1)`, then for producing `39.3kJ` of heat the amount of carbon required is

A

`1.5 mol`

B

`0.5 mol`

C

`1.2 g`

D

`12 mg`

Text Solution

Verified by Experts

The correct Answer is:
C
`12 g` of graphite produced heat `=393.3 kJ`
`:. 393.3 kJ` of heat is produced from graphite `=1.2 g`
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DINESH PUBLICATION-CHEMICAL THERMODYNAMICS AND CHEMICAL ENERGETICS -Exercise
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  2. If DeltaH(f)^(@) of Icl(g), Cl(g) and I(g) is 17.57, 121.34 and 106.96...

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  3. If the enthalpy of combustion of C(graphite) is -393.3kJ mol^(-1), the...

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  4. An ideal gas expands from 10^(-3) m^(3) to 10^(-2) m^(3) at 300 K agai...

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  5. The equilibrium constant for certain reaction is 100. If the value R i...

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  6. Bond dissociation energy of O(2)(g) is x k J mol^(-1). This means that

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  7. H(2)O(l)toH(2)O(g) , DeltaH=+43.7 kJ H(2)O(s)toH(2)O(l) , DeltaH=+6....

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  8. Given that CH(4)(g) +360 kJ rarr C(g) +4H(g) C(2)H(6)(g) +620 kJ r...

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  9. For a reaction Br(2)(l)+Cl(2)(g)to2BrCl at 300K the value of DeltaH=...

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  10. At what temperature, DeltaG of a reaction is equal to -5.2 kJ mol^(-1)...

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  11. For a reaction A(g)+3B(g)to2C(g) , DeltaH^(@)=-24kJ The value of D...

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  12. Consider the following reaction at equilibrium 2Fe^(2+)(aq)+Cu^(2+)to2...

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  13. A gas absorbs 400J of heat and expands by 2 xx 10^(-3) m^(3) against a...

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  14. The enthalpy of formation of ammonia is -46.0 kJ mol^(-1). The enthalp...

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  15. Which one of the following relations is incorrect ?

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  16. The work done by the system in a cyclic process involving one mole of ...

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  17. The work done by the system in the conversion of 1 mol of water at 100...

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  18. If DeltaH(f)(X), DeltaH(f)(Y), DeltaH(f)(R ) and DeltaH(f)(S) denote t...

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  19. The enthalpy of the reaction H(2)(g)+(1)/(2)O(2)(g)toH(2)O(g) is Del...

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  20. The enthalpy of the reaction : H(2)O(2)(l)toH(2)O(l)+(1)/(2)O(2)(g) ...

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