Given that the bond energies of : N N is 946 ~kJ ~mol ⁻¹ H - H is 435 ~kJ ~mol ⁻¹, ~N - N is 159 ~kJ ~mol ⁻¹ , and N - H is 389 kJ mol ⁻¹ , the heat of formation f hydrazine in the gas phase in kJ mol ⁻¹ is

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Correct answer: B. 101

N ₂( ~g )+2 H ₂( ~g ) N ₂ H ₄( ~g ) = ( BDE )_ Reacant - ( BDE )_ Products

Given that the bond energies of : N N is 946 ~kJ ~mol ⁻¹ H - H is 435 ~kJ ~mol ⁻¹, ~N - N is 159 ~kJ ~mol ⁻¹ , and N - H is 389 kJ mol ⁻¹ , the heat of formation f hydrazine in the gas phase in kJ mol ⁻¹ is

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