# a level chemistry

two most abundant atmospheric gases react to a small extent at 298K in the presence of a catalyst to achieve dynamic equilibrium:

N2(g) + O2(g) ->/<- 2NO(g) Kp= 0.30

Partial pressure of N2 and O2 = 0.78atm
1dm3 flask and equilibrium established after 30min.

temperature of system raised to 350K at 40min and equilibrium re-established at 60min. calculate the presssure of N2 and NO at 70min

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1. 1. Is the 0.78 atm the partial pressure to start or after equilibrium is established?

2. What's the new Kp (or Kc) at 350K?
I suggest you repost the question at the top of the page and include the information in answer to the questions 1 and 2.

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posted by DrBob222

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