1. At 500°C, the reaction between N, and H, to form ammonia has K. = 6.0 x 10-2. What is the numerical' value of K, for the reaction?
2. The value of K, at 25°C for the reaction 2NO(g) + CI, (g) = 2NOCI(g) is 1.9 ~ 103 atm-'
Calculate the value of K at the same temperature.
3. At equilibrium for the reaction 25026) + O26) = 28036) the concentrations of reactants and
products at 727°C were found to be: SO, = 0.27 mol L-'; 02 = 0.40 mol L-
4. Some nitrogen and hydrogen gases are pumped into an empty five-litre glass bulb at 500°C.
When equilibrium is established, 3.00 moles of N, 2.10 moles of H, and 0.298 mole of NH, are
found to be present. Find the value of Kat 500°C.
5. Calculate the equilibrium constant at 25°C for the reaction 2NOCI(g) = 2NO(g) + Cl2 w In an
experiment, 2.00 moles of NOCI were placed in a one-litre flask and the concentration of NO after
equilibrium achieved was 0.66 mole/litre.
6. At a certain temperature, 0.100 mole of H, and 0.100 mole of I were placed in a one-litre flask.
The purple colour of iodine vapour was used to monitor the reaction. After a time, the equilibrium
H, +1, 2HI was established and it was found that the concentration of I, decreased to 0.020
mole/litre. Calculate the value of Kc for the reaction at the given temperature.
7. 13.5 ml of HI are produced by the interaction of 8.1 ml of hydrogen and 9.3ml of iodine vapour
at 444°C. Calculate the equilibrium constant at this temperature of the reaction.
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