Question

1. characterize the substances below with the help of their respective melting and boiling points.

si₃h₈	cucl	in	xe

|tₘ = -117.4⁰c
tᵦ = 52.9⁰c|tₘ = 423⁰c
tᵦ = 1490⁰c|tₘ = 156.6⁰c
tᵦ = 2027⁰c|tₘ = -111.75⁰c
tᵦ = -108.099⁰c|

	si₃h₈	cucl	in	xe
b.	molecular	network	metallic	metallic
c.	ionic	ionic	metallic	molecular
d.	ionic	network	molecular	molecular
e.	molecular	molecular	metallic	metallic

Explanation:

Step1: Analyze $\text{Si}_3\text{H}_8$

$\text{Si}_3\text{H}_8$ has low melting ($T_m=- 117.4^{\circ}\text{C}$) and boiling ($T_b = 52.9^{\circ}\text{C}$) points, characteristic of molecular substances.

Step2: Analyze $\text{CuCl}$

$\text{CuCl}$ has a relatively high melting point ($T_m = 423^{\circ}\text{C}$) and a very high boiling point ($T_b=1490^{\circ}\text{C}$), typical of ionic compounds.

Step3: Analyze $\text{In}$

$\text{In}$ (indium) is a metal. Metals have metallic bonding, and its melting point ($T_m = 156.6^{\circ}\text{C}$) and boiling point ($T_b = 2027^{\circ}\text{C}$) are consistent with metallic substances.

Step4: Analyze $\text{Xe}$

$\text{Xe}$ (xenon) is a noble - gas. It has low melting ($T_m=-111.75^{\circ}\text{C}$) and boiling ($T_b=-108.099^{\circ}\text{C}$) points, characteristic of molecular substances.

Answer:

A. Molecular, Ionic, Metallic, Molecular