Find average bond energy of S-F in `SF_6` (in KJ/mole) using following data
`DeltaH_f^@ (SF_6(g))` = -1100Kj/mole, `DeltaH_f^@ (S(g))` = 285Kj/mole, `DeltaH_f^@ (F(g))` = 80Kj/mole

Calculate bond energy of X-X bond from the following data. DeltaH_(f) "of" X(g)=+300 kJ//"mole"

Calculate C-H bond energy from the following data : Delta_(f)H" "[C(g)]=716.68 kJ//"mole" Delta_(f)H" "[H(g)]=217.97 kJ//"mole" Delta_(f)H" "[CH_(4)(g)]=-74.81 kJ//"mole"

The S-S bond energy is if DeltaH_(f)^(@)(E_(t)-S-E_(t))=-147kJ//mol,DeltaH_(f)^(@)(E_(t)-S-S-E_(t))=-202kJ//mol and DeltaH_(f)^(@)S(g)=+223 kJ//mol:

Find bond enthalpy of C=O (in kJ/mol) using following information : DeltaH_("atomisation")[C(s)]=700 kJ/mol DeltaH_(f)[CO_(2)(g)]=-400 kJ/mol BE_(o=o=500 kJ/mol Resonance energy of CO_(2)=-150 kJ/mol

Molar enthalpy of combustion of C_(2)H_(2)(g),C_("graphite")andH_(2)(g) are -1300,-394, and -286 KJ/mole respectively , then , Calculate Bond enthalpy of C-=C bond inKJ /mole: "Given" : DeltaH_("sub") (C_("graphite"))=715 KJ//"mole" DeltaH_(BE)(H-H)=436 KJ//"mole" DeltaH_(BE)(C-H)=413KJ//"mole"

If bond energy of H_(2),F_(2) and HF are in the ratio 2:1:3 and DeltaH_(a)(H_(2))=400kJ//mol . Then DeltaH_(f)(HF) is :

Calculate heat relesed (in Kj) when 2 moles of gaseous methane undergoes combustion in a rigid vessel of volume 50 liters causing a change in pressure from 10 bar to 2 bar at 300K. [Useful data : DeltaH_(f)H_(2)O =-280kJ/mole, DeltaH_(f)CO_(2) =-390kJ/mole, DeltaH_(f)CH_(4) =-390kJ/mole,=-70kJ/mole],