High School

A syringe containing 1.64 mL of oxygen gas is cooled from 94.6°C to 0.3°C. What is the final volume, [tex]V_f[/tex], of the oxygen gas?

Answer :

Answer:

[tex]V_f=V_2=1.22\times 10^{-3} L=1.22mL[/tex]

Explanation:

Use Charles's law which states: "At constant pressure, the volume occupied by a gas sample is directly proportional to the absolute temperatures they support."

This law can be expressed mathematically as follows:

[tex]\frac{V_1}{T_1}=\frac{V_2}{T_2}[/tex]

Where:

[tex]V_1=Initial\hspace{3}volume=1.64mL=1.64\times 10^{-3} L\\V_2=Final\hspace{3}volume\\T_1=Initial\hspace{3}temperature=94.6$^{\circ}$C=367.75K\\T_2=Final\hspace{3}temperature=0.3$^{\circ}$C=273.45K[/tex]

Solving for [tex]V_2[/tex]

[tex]V_2=\frac{V_1*T_2}{T_1} =\frac{(1.64\times 10^{-3} )*273.45}{367.75} =1.21946431\times 10^{-3} \approx1.22\times 10^{-3} L =1.22mL[/tex]