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The expression Delta("sub"1)H^(Theta) =D...

The expression `Delta_("sub"1)H^(Theta) =Delta_(fus)H^(Theta) +Delta_(vap)H^(Theta)` is true at al

A

Temperatures

B

Pressure

C

Temperature and pressure

D

Temperatures and `1atm` pressure conditions

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The standard heat of formation of at 298 K for CCl_(4)(g), H_(2)O(g), CO_(2)(g) and HCI(g) are -25.5, -57.8, -94.1 and -22.1 kcal mol^(-1) respectively. Calculate Delta_(r)H^(Theta) for the reaction r CCl_(4)(g)+2H_(2)O(g) rarr CO_(2)(g)+4HCl(g) Hint : Delta_(r)H^(Theta) = sum Delta_(f)H_("Products")^(Theta)- sum Delta_(f)H_("Reactants")^(Theta)

The temperature dependence of equilibrium constant of a reaction is given by In K_(eq) = 4.8 -(2059)/(T) . Find Delta_(r)G^(Theta), Delta_(r)H^(Theta), Delta_(r)S^(Theta) .

Statement-1: Lattice energy of BaSO_(4) is less than its hydration energy. Statement-2: |Delta_(L)H^(Theta)|&|Delta_(hyd)H^(Theta)| both are smaller.

The enthalpy of reaction, Delta_(1) H , is

Calculate Deltah for the eaction BaCO_(3)(s)+2HCI(aq) rarr BaCI_(2)(aq)+CO_(2)(g)+H_(2)O(l) Delta_(f)H^(Theta) (BaCO_(3)) =- 290.8 kcal mol^(-1), Delta_(f)H^(Theta) (H^(o+)) =0 Delta_(f)H^(Theta) (Ba^(++)) = - 128.67 kcal mol^(-1) , Delta_(f)H^(Theta)(CO_(2)) =- 94.05 kcal mol^(-1) , Delta_(f)H^(Theta) (H_(2)O) =- 68.32 kcal mol^(-1)

Consider the reaction: 4NH_(3)(g) +5O_(2)(g) rarr 4NO(g) +6H_(2)O(l) DeltaG^(Theta) =- 1010.5 kJ Calculate Delta_(f)G^(Theta) [NO(g)] if Delta_(f)G^(Theta) (NH_(3)) = -16.6 kJ mol^(-1) and Delta_(f)G^(Theta) [H_(2)O(l)] =- 237.2 kJ mol^(-1) .

From the following data, calculate the standard enthalpy of formation of propane Delta_(f)H^(Theta) CH_(4) = - 17 kcal mol^(-1) Delta_(f)H^(Theta)C_(2)H_(6) =- 24 kcal mol^(-1), BE (C-H) = 99 kcal mol^(-1) (C- C) = 84 kcal mol^(-1) .

Calculate the resonance energy of gaseous benzene form the following data. BE(C-H) = 416.3 kJ mol^(-1) BE(C-C) = 331.4 kJ mol^(-1) BE(C=C) = 591.1 kJ mol^(-1) Delta_("sub")H^(Theta)(C,"graphite") = 718.4 kJ mol^(-1) Delta_("diss")H^(Theta)(H_(2),g) = 435.9 kJ mol^(-1) Delta_(f)H^(Theta) ("benzene", g) = 82.9 kJ mol^(-1)

CENGAGE CHEMISTRY-THERMODYNAMICS-Exercises (Single Correct)
  1. For the combustion reaction at 298K 2Ag(s)+1//2O(2)(g) rarr 2Ag(2)O(...

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  2. For the equations C("diamond") +2H(2)(g) rarr CH(4)(g) DeltaH(1) C...

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  3. The expression Delta("sub"1)H^(Theta) =Delta(fus)H^(Theta) +Delta(vap)...

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  4. The word 'standard' in standard molar enthalpy change implies

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  5. For which of the following equations, will DeltaH be equal to DeltaU?

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  6. The enthalpy change for chemical reaction is denoted aas DeltaH^(Theta...

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  7. Enthalpy chane of a reaction with be equal to

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  8. The molar enthalpies of combustion of C(2)H(2)(g), C("graphite") and H...

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  9. The relationship between enthalpy and internal energy change is

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  10. The equilibrium state is attained when the reversible reaction is carr...

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  11. The relationship between the free energy change (DeltaG) and entropy c...

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  12. For the gaseous reaction involving the complete combustion of isobutan...

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  13. Entropy of system depends upon

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  14. For the gaseous reaction: N(2)O(4) rarr 2NO(2)

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  15. For the reversible process, the value of DeltaS is given by the expres...

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  16. For a process H(2)O(s) rarr H(2)O(l) at 273 K

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  17. i. At absolute zero the entropy of a perfect crystal is zero. This sta...

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  18. In which of the following process DeltaH and DeltaU are of same magnit...

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  19. Enerrgy can transfter from syetm to surroundings as work if

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  20. The state of equilibrium refers to

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