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Hess's law is used to determine...

Hess's law is used to determine

A

Heat of formation of substances which are otherwise difficult to calculate

B

Heat of transition

C

Heat of dissociation

D

All of these

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The correct Answer is:
D
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AAKASH INSTITUTE ENGLISH-THERMODYNAMICS-SECTION-A
  1. The change in enthalpy that takes place when one mole of the compound ...

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  2. The change in enthalpy of a substqance when one mole of the substance ...

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  3. Hess's law is used to determine

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  4. A system absorbs 300 cal of heat. The work done by the system is 200 c...

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  5. In an isothermal process

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  6. The work done during the expansion of a gas from a volume of 3 dm^(3) ...

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  7. 16 g of O(2) gas at STP is expanded so that volume is doubled. Hence, ...

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  8. In a process, a system does 140 J of work on the surroundings and only...

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  9. A system absorbs 800 J of heat and system works equivalent to 900 J by...

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  10. 1 mole of an ideal gas undergoes an isothermal reversible expansion fo...

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  11. Which among the following represents standard enthalpy of formation?

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  12. Which one of the following equations does not correctly respresents th...

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  13. For an isothermal process

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  14. Heat change of a process, in which volume remains constant, is represe...

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  15. If the total enthalpy of reactants and products is H(R) and H(P) respe...

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  16. In which of the following change entropy decreases?

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  17. The value of entropy of the universe is always

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  18. A reaction occurs spontaneously in forward direction if

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  19. For an exothermic reaction to be spontaneous (DeltaS = negative)

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  20. The enthalpy change of a reaction does not depend on

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