! The combustion reaction of dimethylhydrazine is used to fuel rockets (CH3)2NNH, (1) +40,(8) —— N,(8)+44,0...

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Question

Answer 1

Answer #1

Enthalpy change for the forward reaction of 1 mole of (CH3)2NNH2 is -1694 kJ.

When the direction of reaction is reversed then sign of ∆H is also reversed.

Hence for this reaction sign of ∆H will be positive.

Since reaction is multiplied by 2 , enthalpy will also be multiplied by 2.

∆H = 1694 × 2

= 3388 kJ

Answer ---- ∆H = +3388 kJ

Answer 2

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