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The enthalpy of elements in their standa...

The enthalpy of elements in their standard states are taken as zero .The enthalpy of formation of a compound:

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Standard enthalpy of formation is non zero for

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CENGAGE CHEMISTRY ENGLISH-THERMODYNAMICS-Exercises (Fill In The Blanks)
  1. The energy stored within a substance is called its…………..

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  2. A reaction in which heat is absorbed is called an……………….

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  3. The enthalpy of elements in their standard states are taken as zero .T...

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  4. Why is heat of neutralisation for a strong acid and strong base consta...

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  5. Delta("sub")H=………………..+………………. .

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  6. The heat of combustion of benzene is -3264 kJmol^(-1). The heat evolve...

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  7. A process which can take place by itself or by initiation is called a…...

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  8. For a process to be spontaneous at constant T and P :

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  9. An endothermic process is non-spontaneous at some temperature . It ca...

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  10. Coal and petrolem are called……………..fuels.

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  11. In an endothermic reaction, the total enthalpy of reactant is………………tha...

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  12. H(2)(g)+(1)/(2)O(2)(g)rarrH(2)O(l), DeltaH =- 286 kJ 2H(2)(g)+O(2)(g...

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  13. C(4)H(10)+(13)/(2)O(2)(g)rarr4CO(2)(g)+5H(2)O(l), DeltaH =- 2878 kJ ...

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  14. HCI +NaOH rarr NaCI +H(2)O, DeltaH =- 57.1 kJ mol^(-1) DeltaH is the...

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  15. C(s) to C(g) , DeltaH = 716.7 kJ DeltaH is the heat of …………… of gr...

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  16. C(s) to C(g) , DeltaH = 716.7 kJ DeltaH is the heat of …………… of gr...

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  17. H(2)O(s) rarr H(2)O(l), DeltaH = 6.01 kJ DeltaH is the heat of ……………...

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  18. H(2)O(l) rarr H(2)O(s), DeltaH =- 6.01 kJ DeltaH is the heat of …………...

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  19. H(2)O(l) rarr H(2)O(g), DeltaH = +40.7 kJ DeltaH is the heat of …………...

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  20. H(2)O(g) rarr H(2)O(l), DeltaH =- 40.7 kJ DeltaH is the heat of……………...

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