Chapter 3.4, Problem 6RQ

Interpretation Introduction

Interpretation: Name and formula of elements that are gases at $25°C$ needs to be determined.

Concept Introduction: Every matter is made of chemicals; the importance of chemistry is that it's the study of everything. Chemistry is all about how something interacts to affect the structure, composition, as well as knowing properties of substances.

Answer to Problem 6RQ

The name of elements: He, Ne, Ar, Kr, Xe, Rn, Fl, Cl, H, O, N.

Explanation of Solution

A substance which is made entirely from one type of atom, called element.In gases, atoms & molecules are much more spread out as compared to solids and liquids. Gases are not rigid as compare to liquid and solid. They do not have definite shape and definite volume.

The band gap energy decreases as the temperature increases. Gaseous compound is loosely packed together and will be more spaciously distributed. So, the elements that are gases at $25°C$

• He (helium): Compounds - HF (hydrogen fluoride), $C_2{H}_4$(ethylene)
• Ne (neon): Compounds - HCl (hydrogen chloride), $C_2{H}_2$(acetylene)
• Ar (argon): Compounds - HBr (hydrogen bromide), $C_3{H}_8$(propane)
• Kr (krypton): Compounds - HI (hydrogen iodide), $C_4{H}_{10}$ (butane)
• Rn (radon): Compounds - $H_{2}S$ (hydrogen sulfide), $C{O}_2$ carbon dioxide)
• $H_2$ (hydrogen): Compounds - $N{H}_3$(ammonia), NO (nitric oxide)
• $N_2$ (Nitrogen): Compounds - $P{H}_3$ (phosphine), $N_{2}O$(nitrous oxide)

Conclusion

Some common substances that are gases at $25°C$ and $1.0$ atm are He, Ne, Ar, Kr, etc.