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Nitrogen (II) oxide and chlorine react according to the equation 2NO(g) + Cl2(g) → 2NOCl(g); ΔH = -38 kJ mol^-1 The activation energy for the forward reaction is 62 kJ mol^-1 - VCE - SSCE Chemistry - Question 20 - 2004 - Paper 1
Question 20
Nitrogen (II) oxide and chlorine react according to the equation 2NO(g) + Cl2(g) → 2NOCl(g); ΔH = -38 kJ mol^-1 The activation energy for the forward reaction is 6... show full transcript
Worked Solution & Example Answer:Nitrogen (II) oxide and chlorine react according to the equation 2NO(g) + Cl2(g) → 2NOCl(g); ΔH = -38 kJ mol^-1 The activation energy for the forward reaction is 62 kJ mol^-1 - VCE - SSCE Chemistry - Question 20 - 2004 - Paper 1
Step 1
The activation energy of the reverse reaction, in kJ mol^-1, is
Answer
To find the activation energy of the reverse reaction, we can use the relationship between the activation energies of the forward and reverse reactions along with the enthalpy change (ΔH).
The overall reaction can be expressed as:
egin{align*} ext{Activation Energy (reverse)} &= ext{Activation Energy (forward)} + | ext{ΔH}| \ &= 62 ext{ kJ mol}^{-1} + 38 ext{ kJ mol}^{-1} ext{Activation Energy (reverse)} = 100 ext{ kJ mol}^{-1}
Thus, the activation energy of the reverse reaction is 100 kJ mol^-1.