An important reaction that takes place in the atmosphere is NO₂(g) → NO(g) + O(g), which is brought about by sunlight. How much energy must be supplied by the Sun to cause it? Calculate the standard enthalpy of the reaction from the following information:

and from additional information in Appendix 2A.

Transcribed Image Text:

O2(g) NO(g) + O3(g) 20(g) NO2(g) + O2(g) ΔΗ + 498.4 kJ ΔΗ° = -200. kJ =