High School

Consider the two reactions. Using the two reactions, calculate and enter the enthalpy change for the reaction:

\[ N_2(g) + \frac{1}{2}O_2(g) \rightarrow N_2O(g) \]

A. \(-230.4 \text{ kJ/mol}\)
B. \(-100.2 \text{ kJ/mol}\)
C. \(+100.2 \text{ kJ/mol}\)
D. \(+230.4 \text{ kJ/mol}\)

Answer :

Final answer:

The correct answer is option a which is '-230.4 kJ/mol'. Calculate the enthalpy change for the reaction N2(g) + 1/2O2(g) -> N2O(g) using given enthalpies.

Explanation:

The correct answer is option a which is '-230.4 kJ/mol'. Enthalpy change calculation:

  1. Given enthalpy change for N2(g) with O2(g) to form 2NO(g) is 181 kJ.
  2. The enthalpy change for the reaction N2(g) + 1/2O2(g) -> N2O(g) can be calculated as follows:N2(g) + 1/2O2(g) -> NO(g) + 1/2O2(g) (using the given enthalpies)2NO(g) -> N2O(g) + O2(g) (given reaction)By adding these two reactions, the enthalpy change for N2(g) + 1/2O2(g) -> N2O(g) is -230.4 kJ/mol.

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