Question

In: Chemistry

1. At a certain temperature, the Kp for the decomposition of H2S is 0.816. Initially, only...

1. At a certain temperature, the Kp for the decomposition of H2S is 0.816. Initially, only H2S is present at a pressure of 0.247 atm in a closed container. What is the total pressure in the container at equilibrium?

2. If a 2.00 M sample of A is heated to 500 K, what is the concentration of B at equilibrium? Kc= 7.01x10^-6 @ 500K.

3. At equilibrium, the concentrations in this system were found to be [N2]=[O2]=0.100 M and [NO]=0.500 M. If more NO is added, bringing its concentration to 0.800 M, what will the final concentration of NO be after equilibrium is re-established?

Expert Solution

1)

H2S (g) ---------------------------------> H2 (g) + S (g)

0.247 0 0 --------------------> initial

0.247-x x x--------------------> equilibrium

Kp = PH2 x Ps / PH2S

0.816 = x^2 / 0.247 -x

x^2 + 0.816 x - 0.202 = 0

x = 0.199

pressure of H2S = 0.247 - 0.199 = 0.048 atm

pressure of H2 = S = 0.199 atm

total pressure = 0.048 + 0.199 + 0.199

= 0.446 atm

2) reaction missed

3) reaction missed

queen_honey_blossom answered 2 years ago

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