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The enthalpies of all elements in their ...

The enthalpies of all elements in their standard states are _____

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zero
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The standard enthalpies of formation of C_2H_5OH_((l)), CO_(2(g)) and H_2O_((l)) are -277 , -393.5 and -285.5 "kJ mol"^(-1) respectively . Calculate the standard enthalpy change for the reaction C_2H_5OH_((l)) +3O_(2(g)) to 2CO_(2(g)) +3H_2O_((l)) The enthalpy of formation of O_(2(g)) in the standard state is zero , by definition.

FULL MARKS-THERMODYNAMICS -Additional Questions Solved (III) Fill in the Blanks
  1. A thermodynamic state function is a quantity whose value is

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  2. For the process to occur under adiabatic conditions, the correct condi...

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  3. The enthalpies of all elements in their standard states are

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  4. DeltaU^Ө of combustion of methane is -X "kJ mol"^(-1) . The value of D...

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

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  6. A reaction , A+B rarrC+D+q is found to have a positive entropy change ...

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  7. A fundamental goal of thermodynamics is the of the reaction

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  8. The first law of thermodynamics states that DeltaU=

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  9. Anything which separates the system from its surroundings is called

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  10. Hot water in a thermos flask is an example of system

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  11. In which process there is no exchange of heat between the system and s...

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  12. For an adiabatic process q =

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  13. In an isothermal process

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  14. The process in which the volume of the system remains constant is call...

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  15. For an isochoric process , dv=

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  16. Combustion of fuel in a bomb calorimeter is an example of

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  17. The unit of heat is

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  18. The quantity of heat required to raise the temperature of 1 gm of wate...

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  19. The standard substances used in the enthalpy of combustion of a substa...

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  20. The standard value of enthalpy of combustion of benzoic acid is

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