N2 +2O2 →2NO2 +xkJ , 2NO +O2 →2NO2 +ykJ the Value of NO i
Correct answer: D. 2(x - y)
- A. ½(y-x)
- B. y - 2x
- C. x - y
- D. 2(x - y)
Explanation
Reverse the second equation: NO2 + O2 -> 2NO - y kJMultiply this reversed equation by 2: 2NO2 + 2O2 -> 4NO - 2y kJAdd this resulting equation to the first equation: N2 + 2O2 -> 2NO2 + x kJ2NO2 + 2O2 -> 4NO - 2y kJN2 + 4O2 -> 4NO + (x - 2y) kJ
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About Reaction Kinetics
Reaction kinetics relates reaction rate to concentration, temperature, surface area and catalysts. Questions cover rate laws, reaction order, rate constants, activation energy and the activated complex, including how a catalyst lowers the activation energy without changing the overall energy change or equilibrium position.
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