Question

Estimate the value of Hº at 298 K for the following reaction:

3F2(g) + N2(g) 2NF3(g)

Hº =    kJ

Sº is expected to be  ---Select--- large and positive, nearly zero, large and negative .

The reaction would be extensive at  ---Select--- at high temperatures, at low temperatures, at no temperature at all temperatures .

C–H	413		N–H	391		O–H	463		H–H	436
C–F	485		N–F	272		O–F	190		H–F	565		F–F	159
C–Cl	328		N–Cl	200		O–Cl	203		H–Cl	431		Cl–Cl	243
C–Br	276		N–Br	243		O–Br	235		H–Br	366		Br–Br	193
C–I	234					O–I	234		H–I	299		I–I	151

C–C	347		N–N	163		N–O	201		C–N	293		C–O	358		O–O	146
C=C	612		N=N	418		N=O	607		C=N	615		C=O	799		O=O	495
C≡C	820		N≡N	941					C≡N	891		C≡O	1072

Answer 1