5. For the reaction: heat + N2O(g) 2NO2(g) K= [NO2)^2 [N2O] As temperature incre

Question

5. For the reaction: heat + N2O(g) 2NO2(g) K= [NO2)^2 [N2O] As temperature increases, the equilibrium constant, K 6. The solid structure of some metals, like iron, Fe, can change depending on the temperature and external pressure. The body-centered cubic (bee) phase od a metal has a 68% parking efficiency, while the face centered cubic (fee) phase of the same metal has a 74% parking efficiency. For the equilibrium 7. Graphite and buckyball are two allotropes of pure carbon. If the density of solid graphite is about 2 g/mL and that of solid buckyball is about 1.5 g/mL, in which direction would the application of high pressure drive the equilibrium?

Explanation / Answer

1.

N2O4 + heat = 2NO2

As temperature increases reaction shifts in forward direction according to Le Charlier's principle to decrease the temperature by consuming heat.

So the equilibrium constant Keq increases.

2.

bcc = fcc

The FCC has higher density than bcc due to higher packing.

According to Le Chatlier's principle, the increase of pressure will shift equillibrum in a direction where pressure will be used up by increasing density.

So equillibrium will shift to right.

3.

Graphite density is higher than buckyball. So increase of pressure will favour towards formation of graphite by using pressure in increasing density.

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