To determine the final volume of the gas when the pressure is held constant, we can use Charles's law, which states that the volume of a gas is directly proportional to its temperature, assuming pressure and amount of gas remain constant.
Charles's Law can be expressed as:
V₁ / T₁ = V₂ / T₂
Where: V₁ = Initial volume T₁ = Initial temperature V₂ = Final volume (to be determined) T₂ = Final temperature
Given: V₁ = 300 ml T₁ = 125 degrees Celsius = 398 Kelvin T₂ = 155 degrees Celsius = 428 Kelvin
Using the equation, we can solve for V₂:
V₁ / T₁ = V₂ / T₂
V₂ = (V₁ * T₂) / T₁ = (300 ml * 428 K) / 398 K = 323.12 ml (rounded to two decimal places)
Therefore, the final volume of the gas, when the pressure is held constant, is approximately 323.12 ml.