Which of the following statement(s) is/are true?A. `DeltaU = 0` for combustion of `C_(2)H_(6)`(g) in a sealed rigid adiabatic containerB. `Delta_(f)H^(@)` (S, monoclinic) `ne 0`C. If dissociation energy of `CH_(4)(g)` is `1656 kJ//"mol"` and `C_(2)H_(6)` (g) is 2812 kJ/mol, then value of C-C bond energy will be 328 kJ/molD. If `DeltaH_(f)(H_(2)O,g)=-242 " kJ"//"mol", DeltaH_("vap")(H_(2)O,l)=44 " kJ"//"mol"` then, `Delta_(f)H^(@)(OH^(-),aq.)` will be -142 kJ/mol

Which of the following statement(s) is/are true?A. `DeltaU = 0` for co

1.	Which of the following statement(s) is/are true?A. `DeltaU = 0` for combustion of `C_(2)H_(6)`(g) in a sealed rigid adiabatic containerB. `Delta_(f)H^(@)` (S, monoclinic) `ne 0`C. If dissociation energy of `CH_(4)(g)` is `1656 kJ//"mol"` and `C_(2)H_(6)` (g) is 2812 kJ/mol, then value of C-C bond energy will be 328 kJ/molD. If `DeltaH_(f)(H_(2)O,g)=-242 " kJ"//"mol", DeltaH_("vap")(H_(2)O,l)=44 " kJ"//"mol"` then, `Delta_(f)H^(@)(OH^(-),aq.)` will be -142 kJ/mol
Answer» Correct Answer - A:C `(a) DeltaE=q+W=0+0=0` `(b) (Delta_(F)H^(@))` (S, rhombic) = 0 `(c )(C-C)+(C-H)=2812` `(C-C)=2812-6xx(1656)/(4)=328` `(d) H_(2)O(l)rarrH_(2)O(g)` `44=-(Delta_(F)H)_(H_(2)O(l))-242` `(Delta_(F)H)_(H_(2)O(l))=-286` `H^(+)(aq)+OH^(-)(aq)rarrH_(2)O(l)` `-57.3 =- 286 -4 (Delta_(f)H)_(OH^(-))(aq)(Delta_(f)H)_(OH^(-))=-228.7`

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