Question

Hydrogen is used as a rocket fuel because it is very light and reacts explosively and completely with oxygen. For the combustion reaction 2H2(g)+O2(g)⇌2H2O(g) what is the likely magnitude of the equilibrium constant K?

1.K<10−3

2.10−3<K<103

3.K=0

4.K>103

PART B

The industrial production of lime (CaO) from calcium carbonate is accomplished via the following reaction:

CaCO3(s)⇌CaO(s)+CO2(g)

Given the following data:

Temperature (K)	K
298	1.93×10−23
1200	1.01

what can be said about this reaction?

1.Lower temperatures result in more lime formation.

2.The reaction makes more lime at higher temperatures.

3.The reaction goes to completion at 1200 K.

4.The equilibrium lies far to the right at room temperature.

PART C

For the reaction

2H2S(g)⇌2H2(g)+S2(g), K= 1.00×10−6 at 1000 K

what can be said about this reaction at this temperature?

1.The equilibrium lies far to the right.

2.The reaction will proceed very slowly.

3.The reaction contains significant amounts of products and reactants at equilibrium.

4.The equilibrium lies far to the left.

PART D

For the reaction

HCONH2(g)⇌NH3(g)+CO(g), K= 4.84 at 400 K

what can be said about this reaction at this temperature?

1.The equilibrium lies far to the right.

2.The reaction will proceed very slowly.

3.The reaction contains significant amounts of products and reactants at equilibrium.

4. The equilibrium lies far to the left.