If `Delta_(f)H^(@)(C_(2)H_(4))` and `Delta_(f)H^(@)(C_(2)H_(6))` are `x_(1)` and `x_(2)` kcal `mol^(-1)`, then heat of hydrogenation of `C_(2)H_(4)` is :
C_(2)H_(4)+2HClrarrC_(2)H_(4)Cl_(2) is an example of
C_(2)H_(6) overset(450^(@)C)toC_(2) H_(4)+H_(2) Above reaction is called as
The heat of combustion of CH_(4) ,C(graphite) and H_(2)(g) are respectively 20 kcal and -10 kcal. The heat of formation of CH_(4) is
The bond dissociation energy depends upon the nature of the bond and nature of the molecule. If any molecule more than 1 bonds of similar nature are present then the bond energy reported is the average bond energy. If enthalpy of hydrogenation of C_(6)H_(6(l)) "into" C_(6)H_(12(l)) " is " -205 kJ and resonance energy of C_(6)H_(6(l)) is -152kJ//mol then enthalpy of hydrogenation of is ? Answer Delta H_("vap") " of " C_(6)H_(6(l)), C_(6)H_(10(l)), C_(6)H_(12(l)) all are equal:
From the following data CH_(3)OH(l)+(3)/(2)O_(2)(g) rarr CO_(2)(g) +2H_(2)O(l) Delta_(r) H^(@)=-726 kJ mol^(-1) H_(2)(g)+(1)/(2)O_(2)(g) rarr H_(2)O(l), Delta _(r) H^(@)=-286 kJ mol^(-1) C("graphite") +O_(2)(g) rarr CO_(2)(g), Delta _(r) H^(@)=-393 kJ mol^(-1) The standard enthalpy of formation of CH_(3)OH(l)" in "kJ mol^(-1) is
C_(2)H_(6)overset(450^(@)C)rarrC_(2)H_(4)+H_(2) . Above reaction is called is
C_(2)H_(6(g)) + 3.5 O_(2(g)) rarr 2CO_(2(g)) + 3H_(2)O_((g)) Delta S_("vap") (H_(2)O,l) = x_(1) " cal" K^(-1) (boiling point is T_(1) ) Delta H_(f) (H_(2)O, l) = x_(2), Delta H_(f) (CO_(2)) = x_(3), Delta H_(f) (C_(2)H_(6)) = x_(4) Hence Delta H for the reaction is
Consider the following data: Delta_(f) H^(2) (N_(2)H_(4), l) =50kJ//mol,, Delta_(f) H^(@) (NH_(3), g)=-46 kJ//mol , B.E. (N-H)= 393kJ//mol and B.E. (H-H)= 436 kJ/mol, also Delta_("vap") H (N_(2)H_(4),l)= 18kJ//mol . The N-N bond energy in N_(2)H_(4) is
NARENDRA AWASTHI-THERMODYNAMICS-Level 3 - Match The Column
