Answer: The correct option is A.
Explanation: To calculate the volume at the end , we use Charles's Law, which states that the volume of the gas is directly proportional to the temperature of the gas at constant pressure.
Mathematically,
[tex]V\propto T[/tex]
or
[tex]\frac{V_1}{T_1}=\frac{V_2}{T_2}[/tex]
[tex]V_1=8.5L[/tex]
[tex]T_1=45^oC=(45+273)K=318K[/tex]
[tex]V_2=?L[/tex]
[tex]T_2=70^oC=(70+273)K=343K[/tex]
Putting all the values in above equation, we get
[tex]\frac{8.5}{318}=\frac{V_2}{343}[/tex]
[tex]V_2=9.2L[/tex]
Hence, the correct option is A.
