Silylene (SiH2) is a key intermediate

Silylene (SiH2) is a key intermediate in the thermal decomposition of silicon hydrides such as silane (SiH4) and disilane (Si2H6). Moffat et al. (H.K.
Moffat, K.F. Jensen, and R.W. Carr, J. Phys. Chem. 95,145 (1991)) report ∆fHo SiH2) = +274 kJ mol-1. If ∆rHo (SiH4) = +34.3 k] mol-1 and ∆fHo(Si1H6)= +80.3 k] mol-1: (CRC Handbook (2004)), compute the standard enthalpies of the following reactions:
(a) SiH4 (g) →7 SiH2 (g) + H2 (g)
(b) Si2H6 (g) ---7 SiH2) + SiH4 (g)

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