For Practice 14.9 with feedback Part A The reaction N2(g) t. 02(g) 2NO(g) is car

Question

For Practice 14.9 with feedback Part A The reaction N2(g) t. 02(g) 2NO(g) is carried out at a temperature at which K- 0.065. The reaction mixture starts with only the product, NO 0.0200 M, and no reactants Find the equilibrium concentrations of N2 at equilibrium. Express your answer to two significant figures and include the appropriate units. You may want to reference (Pages 579-587) Section 14.8 while completing this problem. [N2]-Value .02 MM Submit Incorrect; Try Again; 7 attempts remaining Part B Find the equilibrium concentrations of Op at equilibrium. Express your answer to two significant figures and include the appropriate units. [O)= Value Units Submit Part C Find the equilibrium concentrations of NO at equilibrium. Express your answer to two significant figures and include the appropriate units. [NOJ = Value Units

Explanation / Answer

Reaction with ICE TABLE

N2 + O2 = 2NO

I 0.02

C x x - 2x

E x x (0.02-2x)

Equilibrium constant expression of the reaction

K = [NO]2/ [O2] [N2]

0.065 = [0.02-2x]2/ [x] [x]

0.065x2 = 0.0004 + 4x2 - 0.08x

0.0004 + 3.935x2 - 0.08x = 0

x = 0.008869

Equilibrium concentration of N2 = x = 0.008869 M

Equilibrium concentration of O2 = x = 0.008869 M

Equilibrium concentration of NO = 0.02-2*0.008869

= 0.002262 M

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