Questions+for+class+(Dec.+5,+2007)

1. For the reaction, 2 NO2 <==> N2O4, the equilibrium concentrations are: [NO2] = 3.1 x 10-2 and [N2O4]= 4.5 x 10-3. From these data, calculate Kc for the reaction at this temperature.

2. A 1.00 L vessel contains at equilibrium 0.300 mol of N2, 0.400 mol H2, and 0.100 mol NH3. If the temp is maintained constant, how many moles of H2 must be introduced into the vessel in order to double the equilibrium concentration of NH3?

3. Nitric oxide, NO, is formed in automobile exahaust by the reaction of the N2 and O2 in air. At 2127 °C Kc is 0.0125. Initially a mixture contains 0.850 mol of each N2 and O2 in a 15 liter vessel. Find the concentration of all species when equilibrium is reached at 2127 °C

Do all of the questions here:

http://dbhs.wvusd.k12.ca.us/webdocs/Equilibrium/WS-Keq.pdf Click Here for Answers