Consider the reaction 2 NO(g) + 5 H2(g) → 2 NH3(g) + 2 H20(g) The reaction mixture initially contains 6 moles of NO and 10 moles of H2 contained in a 20.0- liter gas cylinder with a movable piston. At the end of the reaction, the volume has decreased to 15.7 L. Without doing any calculations, which method is the best for determining the concentration of NO in the mixture after the reactants have reacted as completely as possible? Use stoichiometry: 10 moles of H2 consumes 6 moles of NO, so the final concentration of NO = 0 M Use the dilution formula: (6 mol NO)(20.0 L) = (x mol NO)(15.7 L) Use the dilution formula: (2 mol NO)(20.0 L) = (x mol NO)(15.7 L) Use stoichiometry: 10 moles of H2 consumes 4 moles of NO, so the final concentration of NO = moles - 4 moles NO)/(15.7 L) (6
Ideal and Real Gases
Ideal gases obey conditions of the general gas laws under all states of pressure and temperature. Ideal gases are also named perfect gases. The attributes of ideal gases are as follows,
Gas Laws
Gas laws describe the ways in which volume, temperature, pressure, and other conditions correlate when matter is in a gaseous state. The very first observations about the physical properties of gases was made by Robert Boyle in 1662. Later discoveries were made by Charles, Gay-Lussac, Avogadro, and others. Eventually, these observations were combined to produce the ideal gas law.
Gaseous State
It is well known that matter exists in different forms in our surroundings. There are five known states of matter, such as solids, gases, liquids, plasma and Bose-Einstein condensate. The last two are known newly in the recent days. Thus, the detailed forms of matter studied are solids, gases and liquids. The best example of a substance that is present in different states is water. It is solid ice, gaseous vapor or steam and liquid water depending on the temperature and pressure conditions. This is due to the difference in the intermolecular forces and distances. The occurrence of three different phases is due to the difference in the two major forces, the force which tends to tightly hold molecules i.e., forces of attraction and the disruptive forces obtained from the thermal energy of molecules.
![**Consider the Reaction**
\[ 2 \text{NO}(g) + 5 \text{H}_2(g) \rightarrow 2 \text{NH}_3(g) + 2 \text{H}_2\text{O}(g) \]
The reaction mixture initially contains 6 moles of NO and 10 moles of H₂ contained in a 20.0-liter gas cylinder with a movable piston. At the end of the reaction, the volume has decreased to 15.7 L. Without doing any calculations, which method is the best for determining the concentration of NO in the mixture after the reactants have reacted as completely as possible?
1. ○ Use stoichiometry: 10 moles of H₂ consumes 6 moles of NO, so the final concentration of NO = 0 M.
2. ○ Use the dilution formula: \((6 \text{ mol NO})(20.0 \text{ L}) = (x \text{ mol NO})(15.7 \text{ L})\).
3. ○ Use the dilution formula: \((2 \text{ mol NO})(20.0 \text{ L}) = (x \text{ mol NO})(15.7 \text{ L})\).
4. ○ Use stoichiometry: 10 moles of H₂ consumes 4 moles of NO, so the final concentration of NO = \(\frac{(6 \text{ moles} - 4 \text{ moles NO})}{15.7 \text{ L}}\).](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F3ac3995c-903b-421c-80b6-6f6642a05fa9%2F66dda644-4b0a-4da4-9346-5f950a5f1836%2Fqha7ntb_processed.jpeg&w=3840&q=75)
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