A gas at 65degree c occupies 4.22l. What will be the volume of the gas at a temperature of 36.9degree c assuming constant pressure

To convert Celsius to Kelvin, add 273.15.

Initial Volume ($V_1$) = $4.22 \, \text{L}$
Initial Temperature ($T_1$) = $338.15 \, \text{K}$
Final Temperature ($T_2$) = $310.05 \, \text{K}$
Final Volume ($V_2$) = ?

Charles's Law states that for a fixed amount of gas at constant pressure, the volume is directly proportional to its absolute temperature:

To find $V_2$, rearrange the formula:

The volume of the gas at $36.9 \, ^\circ\text{C}$ will be approximately 3.87 L.