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C(s)+(1)/(2)O(2)(g)toCO(g),DeltaH=-110.4...

`C(s)+(1)/(2)O_(2)(g)toCO(g),DeltaH=-110.4kJ`. Does this `DeltaH` represent enthalpy of combustion of carbon?

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At 25^(@)C , the standard reaction enthalpy for the reaction, 2C(graphite, s) +O_(2)(g)to2CO(g) is -221.0kJ. Does this enthalpy change indicate the standard enthalpy of formation of CO(g) ? If not, then what would be the value of the enthalpy of formation of CO(g) at 25^(@)C ?

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H_(2)(g)+(1)/(2)O_(2)(g)toH_(2)O(l),DeltaH=-285.8kJ . What will be the value of DeltaH for the reaction: 2H_(2)O(l)to2H_(2)(g) +O_(2)(g) ?

Given: (1) A(s)+B_(2)(g) to AB_(2)(g),DeltaH^(0)=-xkJ (2) A(s)+(3)/(2)B_(2)(g)toAB_(3)(g),DeltaH^(0)=-ykJ Using above equations, determine standard reaction enthalpy for the reaction: 2AB_(3)(g)to2AB_(2)(g)+B_(2)(g) .

Given that H_2O(l) rarr H^+ (aq) + OH^- (aq), DeltaH = 57.32 kJ H_2 (g) + 1/2 O_2(g) rarr H_2O(l) , DeltaH = -286.02 kJ Then calculate the enthalpy of formation of OH^- at 25^@C .

Consider the reaction: (i) A_(2)(s)+B_(2)(g)toA_(2)(g)+B_(2)(g),DeltaH=-x kJ (ii) A_(2)(g)+B_(2)(g)to2AB(g),DeltaH=-y kJ What is the value of the change in enthalpy for the following reaction A_(2)(s)+B_(2)(g)to2AB(g) ?

Given (at 25^(@)C and 1 atm pressure): C(s, diamond) +O_(2)(g)toCO_(2)(g),DeltaH^(0)=-393.5kJ*mol^(-1) C(s, graphite) +O_(2)(g)toCO_(2)(g),DeltaH^(0)=-391.6kJ*mol^(-1) Find the standard heat of transition from graphite to diamond.

At 25^(@)C the standard reaction enthalpy for the reaction AB_(3)(g)to(1)/(2) A_(2)(g)+(3)/(2)B_(2)(g) is DeltaH^(0) . Find the standard reaction enthalpy for the reaction A_(2)(g)+3B_(2)(g) to 2AB_(3)(g) at 25^(@)C .

CHHAYA PUBLICATION-CHEMICAL THERMODYNAMICS-SHORT TYPE QUESTIONS
  1. Given: C(graphite, s)+O(2)(g)toCO(2)(g),DeltaH^(0)=x(1) C(graphite, ...

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  2. At 25^(@)C,DeltaH(f)^(0)=0 for graphite, but for diamond DeltaH(f)^(0)...

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  3. Mention two applications of Hess's law.

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  4. "At 25^(@)C, the standard heat of combustion of graphite is -94300cal*...

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  5. "At 25^(@)C, the standard heat of formation of H(2)O(l) is -285.83kJ*m...

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  6. (1)/(2)A(2)(g)+(1)/(2)B(2)(g)toAB(g),DeltaH=-50kcal. If the bond energ...

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  7. C(s)+(1)/(2)O(2)(g)toCO(g),DeltaH=-110.4kJ. Does this DeltaH represent...

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  8. Give two examples of spontaneous process.

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  9. When an adiabatic process is said to be an isoentropic process ?

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  10. An exothermic reaction associated with decrease in entropy takes place...

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  11. What are the conditions of spontaneity and equilibrium for a process i...

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  12. Cl(g)+Cl(g) toCl(2)(g). What will be the sign of DeltaH and DeltaS in ...

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  13. Why is soild NaCl soluble in water although enthalpy of solution for N...

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  14. Why is the entropy of ice less than that of water?

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  15. Does the entropy of the system increase or decrease in the reaction: 2...

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  16. Why is (DeltaS("system")+DeltaS("surroundings")) zero is a reversible ...

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  17. Many spontaneous processes are accompanied by decrease in entropy-expl...

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  18. Why is the entropy of any pure and perfectly crystalline substance at ...

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  19. Why solidification of water does not occur spontaneously although it i...

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  20. Why is Gibbs free energy called 'free energy' ?

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