Answer:
D
Explanation:
∆H° = ∆Hf ° (products) – ∆Hf ° (reactants)
I might not be right but I think the empirical formula is NO2
Water's specific heat capacity is 4200 J/Kg°C
95-28=67
72.5grams in kg is 0.0725kg
Energy = 67×0.0725×4200
Energy = 20,401.5 J or 20.4015 kJ
