Chapter 11, Problem 4E

Interpretation Introduction

(a)

Interpretation:

The physical state of $\text{Ne}$ at $-225\text{°C}$ is to be indicated.

Concept introduction:

Matter can take three different distinct physical forms. These physical forms are termed as physical states. The three states of matter are solid, liquid, and gas. Matter exists as a gas mostly at a high temperature while it can exist as a solid or liquid at room temperature.

Answer to Problem 4E

The physical state of $\text{Ne}$ at $-225\text{°C}$ is gas.

Explanation of Solution

By knowing the melting point and boiling point of a compound, the physical state of the matter can be stated at a particular temperature. If the melting point and boiling point is higher than the particular temperature, then it exists in the solid state at that temperature. If the temperature is higher than the melting point and the boiling point, then the compound is in the gaseous state. If the temperature is in between the melting point and the boiling point, then the compound is in a liquid state.

The melting point of neon, $\text{Ne}$ is $-249\text{°C}$. The boiling point of $\text{Ne}$ is $-246\text{°C}$.

The temperature of $-225\text{°C}$ is higher than the melting and boiling point of $\text{Ne}$. Therefore, $\text{Ne}$ is present in the gaseous state at $-225\text{°C}$.

Conclusion

The element, $\text{Ne}$ is present as a gas at $-225\text{°C}$.

Interpretation Introduction

(b)

Interpretation:

The physical state of $\text{Ne}$ at $-255\text{°C}$ is to be indicated.

Concept introduction:

Matter can take three different distinct physical forms. These physical forms are termed as physical states. The three states of matter are solid, liquid, and gas. Matter exists as a gas mostly at a high temperature while it can exist as a solid or liquid at room temperature.

Answer to Problem 4E

The physical state of $\text{Ne}$ at $-255\text{°C}$ is solid.

Explanation of Solution

By knowing the melting point and boiling point of a compound, the physical state of the matter can be stated at a particular temperature. If the melting point and boiling point is higher than the particular temperature, then it exists in the solid state at that temperature. If the temperature is higher than the melting point and the boiling point, then the compound is in the gaseous state. If the temperature is in between the melting point and the boiling point, then the compound is in a liquid state.

The melting point of neon, $\text{Ne}$ is $-249\text{°C}$. The boiling point of $\text{Ne}$ is $-246\text{°C}$.

The temperature of $-255\text{°C}$ is lower than the melting and boiling point of $\text{Ne}$. Therefore, $\text{Ne}$ is present in the gaseous state at $-255\text{°C}$.

Conclusion

The element, $\text{Ne}$ is present as a solid at $-255\text{°C}$.

Interpretation Introduction

(c)

Interpretation:

The physical state of $\text{Ar}$ at $-175\text{°C}$ is to be indicated.

Concept introduction:

Matter can take three different distinct physical forms. These physical forms are termed as physical states. The three states of matter are solid, liquid, and gas. Matter exists as a gas mostly at a high temperature while it can exist as a solid or liquid at room temperature.

Answer to Problem 4E

The physical state of $\text{Ar}$ at $-175\text{°C}$ is gas.

Explanation of Solution

By knowing the melting point and boiling point of a compound, the physical state of the matter can be stated at a particular temperature. If the melting point and boiling point is higher than the particular temperature, then it exists in the solid state at that temperature. If the temperature is higher than the melting point and the boiling point, then the compound is in the gaseous state. If the temperature is in between the melting point and the boiling point, then the compound is in a liquid state.

The melting point of argon, $\text{Ar}$ is $-189\text{°C}$. The boiling point of $\text{Ar}$ is $-186\text{°C}$.

The temperature of $-175\text{°C}$ is higher than the melting and boiling point of $\text{Ar}$. Therefore, $\text{Ar}$ is present in the gaseous state at $-175\text{°C}$.

Conclusion

The element, $\text{Ar}$ is present as a gas at $-175\text{°C}$.

Interpretation Introduction

(d)

Interpretation:

The physical state of $\text{Ar}$ at $-200\text{°C}$ is to be indicated.

Concept introduction:

Matter can take three different distinct physical forms. These physical forms are termed as physical states. The three states of matter are solid, liquid, and gas. Matter exists as a gas mostly at a high temperature while it can exist as a solid or liquid at room temperature.

Answer to Problem 4E

The physical state of $\text{Ar}$ at $-200\text{°C}$ is solid.

Explanation of Solution

By knowing the melting point and boiling point of a compound, the physical state of the matter can be stated at a particular temperature. If the melting point and boiling point is higher than the particular temperature, then it exists in the solid state at that temperature. If the temperature is higher than the melting point and the boiling point, then the compound is in the gaseous state. If the temperature is in between the melting point and the boiling point, then the compound is in a liquid state.

The melting point of neon, $\text{Ar}$ is $-189\text{°C}$. The boiling point of $\text{Ar}$ is $-186\text{°C}$.

The temperature of $-200\text{°C}$ is lower than the melting and boiling point of $\text{Ar}$. Therefore, $\text{Ar}$ is present in the gaseous state at $-200\text{°C}$.

Conclusion

The element, $\text{Ar}$ is present as a solid at $-200\text{°C}$.