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The enthalpy of formation for all elemen...

The enthalpy of formation for all elements in their standard state is

A

unit

B

Zero

C

less than zero

D

different elements

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CHETANA PUBLICATION-Chemical Thermodynamics-EXERCISE
  1. A gas is allowed to expand in a well insulated container against a con...

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  2. In which of the following entropy of the system decreases?

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  3. The enthalpy of formation for all elements in their standard state is

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  4. Which of the following reaction is exothermic ?

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  5. 6.24 g of ethanol are vaporized by supplying 5.89kJ of heat.Enthalpy o...

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  6. If the standard enthalpy of formation of methanol is -238.9 kJ mol^(-1...

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  7. For vaporization of water at 1bar,DeltaH=40.63kJ mol^(-1)and DeltaS = ...

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  8. Bond enthalpies of H-H, Cl-Cl and H-Cl bonds are 434 kj mol^(-1), 242 ...

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  9. Which of the following is not a state function?

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  10. Which of the following is not an extensive property?

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  11. An endothermic reaction is one in which heat content of

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  12. In a chemical reaction, work is done by the system when

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  13. Which of the following is an intensive property?

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  14. When a sample of an ideal gas is allowed to expand at constant tempera...

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  15. A gas of 0.320 kJ works on its surroundings and absorbs 120 J of heat ...

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  16. In the reaction, H2 + Cl2 rarr 2HCl DeltaH =-184 kJ, if 2 moles of H2 ...

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  17. The enthalpies of formation of N2O and NO at 298 K are 82 and 90 kJ mo...

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  18. For which of the following substances DeltafH^@ is not zero.

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  19. If for a reaction, DeltaH is negative and DeltaS is positive then the ...

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  20. Properties of a system which are proportional to the quantity of matte...

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