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Define heat of combustion....

Define heat of combustion.

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Enthalpy of combustion is defined as the change in enthalpy, when one mole of a substance is completelt burnt in excess of oxygen.
For example, enthalpy of combustion of carbon is given by the following equation :
`C(s) + O_(2) to CO_(2) (g), Delta H = - 393.5 kj`
Signiicance : Enthalpy of combustion is used to decide the quality of fuel. If the fuel has large heat of combustion. then it will of a good quality fuel and vice versa.
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OMEGA PUBLICATION-THERMODYNAMICS-MULTIPLE CHOICE QUESTIONS (MCQ)
  1. Define heat of combustion.

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  2. The intensive property among these quantities is

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  3. Identify the extensive property among the followings

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  4. An adiabatic expansion of an ideal gas always has

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  5. During isothermal expansion of an ideal gas, its

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  6. Enthalpy of a reaction Delta H is expressed as

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  7. The heat required to raise the temperature of a body by 1C degree is c...

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  8. According to the second law of thermodynamics , a process (reaction is...

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  9. Considering entropy (S) as a thermodynamic parameter the criterion fo...

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  10. Delta G = Delta H - T Delta S was given by

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  11. What is pistil?

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  12. The occurrence of reaction is impossible if

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  13. One calorie is equivalent to

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  14. For an adiabatic proces which of the following relations is correct ?

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  15. For the reactions : C(s) + O(2) (g) to CO(2) (g)

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  16. For the reaction : C(3)H(8)(g) + 5O(2) (g) to 3 CO(2) (g) + 4H(2) O...

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  17. Which one of the following expressions represents the first law of the...

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  18. For a reaction N(2(g)) + 3H(2(g)) hArr 2NH(3(g))

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  19. What do mean by the term- Weed?

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  20. What are trees? Give two examples?

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  21. For a reversible process at equilibrium, the change in entropy may be ...

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