Question

A 8.5 L sample is collected at 45°C. What will the volume be if the temperature is raised to 70°C? End of exam A. 9.2 L B. 13.2 L C. 7.9 L D. 5.5 L

Answer 1

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,

`V\propto T`

or

`(V_1)/(T_1)=(V_2)/(T_2)`

• Initial conditions:

`V_1=8.5L`

`T_1=45^oC=(45+273)K=318K`

• Final conditions:

`V_2=?L`

`T_2=70^oC=(70+273)K=343K`

Putting all the values in above equation, we get

`(8.5)/(318)=(V_2)/(343)`

`V_2=9.2L`

Hence, the correct option is A.