A Level Chemistry 9701/11/O/N/20 Q31

Question

Nitrogen forms a number of oxides. Their enthalpies of formation are given.

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Which statements are correct?
1 If N2O(g) is oxidised by O2(g) to NO2(g), 16 kJ is released per mole of N2O.
2 The decomposition of N2O(g) to N2(g) and O2(g) is exothermic.
3 The reaction between NO and oxygen is exothermic.

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