The value of the rate constant for the gas phase reaction, 2NO₂ + F₂ → 2NO₂F is 38 dm³ mol⁻¹ s⁻¹ at 300 K. The order of
2 correct as per chemistry principle.
Ref: NCERT Chemistry Class XII — Chemical Kinetics and Surface Chemistry
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What is the oxidation number of nitrogen in NO₂?
Let N = x. O = -2. Equation: x + 2(-2) = 0, x - 4 = 0, x = +4.
Ref: NCERT Class 11 Chemistry > Chapter 7: Redox Reactions > Topic: Balancing Redox Reactions - Oxidation Number Method and Half Reaction
The enthalpy of formation of NO₂(g) is 33.2 kJ/mol. What is Δ H for N₂(g) + 2O₂(g) → 2NO₂(g)?
Δ H = 2 × Δ Hf° (NO₂) - [Δ Hf° (N₂) + 2 × Δ Hf° (O₂)] = 2 × 33.2 - [0 + 0] = 66.4 kJ/mol.
Ref: NCERT Class 11 Chemistry > Chapter 5: Thermodynamics > Topic: Enthalpy Changes - Reaction Formation Combustion and Hess's Law
