1.

1)-93 kJ 2)53. The standard heat of formation values of SF (g), s(9)and F(g) are -1100, 275 and 80 J mol- respecitvely.The energy S-F bond energy in SF.1) 309.2KJ2) 378.2KJ3) 284.6 KJ4) 261.8 KJof and CH​

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