QUESTION 3 10 points Save Answer At 773C the reaction Cg 2H2

QUESTION 3 10 points Save Answer At 773°C the reaction: Cg 2H2g) -CH3OHg) has a Kc of 0.40. The Kp is closest to 5.4X 105 2.1 x103 6.0x105 4X 10-4 QUESTION 4 10 points Save Answer Nitrogen and hydrogen are placed in a high temperature reaction vessel to form ammonia according to the equation: N2(g) 3H2(g) 2NH3(9) If the equilibrium concentration of N2, H2 and NH3 were each 2.0 M, the value of Ko would be 0.5 0.25 2.0 4.0

Solution

3) We have n = n_products – n_reactants = [1 – (1 + 2)] mole = (1 – 3) mole = -2 mole (n = number of moles of gases)

K_p and K_c are related as

K_p = K_c*(RT)ⁿ where T = 773°C = (773 + 273) K = 1046 K is the temperature of the reaction.

=====> K_p (0.40)*(0.082*1046)^-2 = (0.40)*(85.772)^-2 = (0.40)*(1.3593*10^-4) = 5.4371*10^-5 5.4*10^-5

The 1^st. option is the correct answer (ans).

4) Write down the expression for the equilibrium constant

K_c = [NH₃]²/[N₂][H₂]³ = (2.0)²/(2.0).(2.0)³ = 4.0/(2.0*8.0) = 4.0/16.0 =0.25 (ans).