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The enthalpy of combustion of methane, g...

The enthalpy of combustion of methane, graphite and dihydrogen at 298 K are, `-890.3kJ mol^(1)-393.5 kJ mol^(-1), and -285.8 kJ mol^(-1)` espectively. Enthalpy of formation of `CH_(4)(g)` will be

A

`-74.9 kJ mol^(-1)`

B

`-52.27 kJ mol^(-1)`

C

` + 74.8kJ mol^(-1)`

D

` + 52.26 kJ mol^(-1)`

Text Solution

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The correct Answer is:
A
`-74.9 kJ mol^(-1)`
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ICSE-CHEMICAL THERMODYNAMICS -NCERT TEXT-BOOK. EXERCISES
  1. The enthalpies of all elements in their standard states are

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  2. DeltaU^@ of combustion of methane is -X kJ mol^(-1). The value of Delt...

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  3. The enthalpy of combustion of methane, graphite and dihydrogen at 298 ...

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  4. A reaction A + B toC + D + q is found to have a positive entropy chang...

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  5. In a process, 701 J of heat is absorbed by a system and 394 J of work ...

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  6. The reaction of cyanamide, NH(2)CN (s), with dioxygen was carried out ...

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  7. Calculate the number of kJ of heat necessary to raise the temperature ...

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  8. The enthalpy change on freezing of 1 mol of water at 5^(@)C to ice at ...

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  9. Enthalpy of combustion of carbon to CO2 is -393.5 kJ mol^(-1) Calcu...

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  10. Enthalpies of formation of CO(g).CO(2)(g) and N(2)O(4) are -110,-393,8...

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  11. Given N(2)(g)+3H(2)(g)rarr2NH(3)(g),Delta(r)H^(Ө)= -92.4 kJ mol^(-1...

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  12. Calculate the standard enthalpy of formation of CH(3)OH(l) from the fo...

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  13. Calculate the enthalpy change for the process C CI(4)(g)rarrC(g)+4C...

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  14. For an isolated system, DeltaU=0, what will be Delta S?

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  15. For the reaction at 298 K, 2A + B to C DeltaH=400 KJ mol^(-1) an...

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  16. For the reaction, 2Cl(g) to Cl2(g), what are the signs of DeltaH and D...

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  17. For the reaction 2A(g)+B(g)rarr2D(g) DeltaU^(theta)=-10.55 KJ and ...

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  18. The equilibrium constant for a reaction is 10. What will be the value ...

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  19. Comment on the thermodynamic stability of NO((g)), given (1)/(2)N(2)...

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  20. Calculate the entropy change in surroundings when 1.00 mole of H2O(l) ...

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