For the reaction
`C_(6)H_(5)CO_(2)H(s)+O_(2)(g)rarrCO_(2)+H_(2)O`
`Delta U^(0)=-772.7kJmol^(-1)` at 298K. Calculate `Delta H^(0)`.
(A) `+760.3kJmol^(-1)`
(B) `-760.3kJmol^(-1)`
(C) `+670.3kJmol^(-1)`
(D) `-790.3kJmol^(-1)`

For the reaction : C_(2)H_(5)OH(l)+3O_(2)(g)rarr2CO_(2)(g)+3H_(2)O(g) if Delta U^(@)= -1373 kJ mol^(-1) at 298 K . Calculate Delta H^(@)

For the reaction C_(3)H_(8)(g) + 5 O_(2)(g) rightarrow 3CO_(2)(g) + 4 H_(2)O(l) at constant temperature , DeltaH - Delta E is

For the reaction CH_(4(g))+2O_(2(g))hArrCO_(2(g))+2H_(2)O_(l) : ( DeltaH=-170.8 kJmol^(-1) ). Which of the following statement is not true?

For the reaction N_(2)(G)+3H_(2)(g)hArr2NH_(3)(g),Delta=-93.6KJmol^(-1) The number of moles of H_(2) at equilibrium will increase If :

DeltaG^(c-) or the reaction is , 4Al+3O_(2)+6H_(2)O+4overset(c-)(O)H rarr 4 Al(OH)_(4)^(c-) E^(c-)._(cell)=2.73V Delta_(f)G^(c-)._((overset(c)(O)H))=-157k J mol^(-1) Delta_(f)G^(c-)._((overset(c-)(H2O))=-237k J mol^(-1) (a) -3.16xx10^(3)kJ mol^(-1) (b) -0.79xx10^(3)kJmol^(-1) (c) -0.263xx10^(3)k J mol^(-1) (d) +0.263xx10^(3)k J mol^(-1)

For the reaction, 2A (s) + 2B (g)to C (g) + D(s) at 298K Delta U ^(@) =-10.5KJ and Delta S ^(@)=-44.10 JK^(-1) Calculate Delta G ^(@) for the reaction (in Joules).

For the reaction 2SO_(2)(g)+O_(2)(g)=2SO_(3)(g) deltaH=-57.2kJmol^(-1) and K_(C)=1.7xx10^(16) ltbr. Which of the following statements is INCORRECT?

Use the standard enthalpies of formation and calculation the enthalpy changes accompanying the following reaction: a. CH_(4)(g)+2O_(2)(g) rarr CO_(2)(g)+2H_(2)O(l) Given, enthalpies of formation of CH_(4) ,CO_(2) and H_(2)O are 74.8 kJmol^(-1) ,−393.5 kJmol^(−1) ,−286 kJmol^(−1) respectively.

Calculate the equilibrium constant for the following reaction at 298K and 1 atmospheric pressure: C(grap hite) +H_(2)O(l) rarr CO(g) +H_(2)(g) Given Delta_(f)H^(Theta) at 298 K for H_(2)O(l) =- 286.0 kJ mol^(-1) for CO(g) =- 110.5 kJ mol^(-1) DeltaS^(Theta) at 298K for the reaction = 252.6 J K^(-1) mol^(-1)

Predict the standard reaction enthalpy of 2NO_(2)(g)rarrN_(2)O_(4)(g) at 100^(@)C . Delta H^(@) at 25^(@)C is -57.2 kj.mol^(-1)C_(p)(NO_(2))=37.2j.mol^(-1)K^(-1)C_(p)(N_(2)O_(4))=77.28 J. mol^(-1)k^(-1)