Boyle's/Mariotte's Law Tutorial

Boyle's/Mariotte's Law:

Boyle's law states that the volume of a gas increases when the pressure decreases at a constant temperature.

Boyle's/Mariotte's Law Example:

Case 1: A certain amount of gas contains a volume of 4 L at 100 kPa pressure. Find the pressure of the gas if it occupies in 15 L container. P_i = 100 kPa, V_i = 4 L, V_f = 15 L

Step 1:

Substitute the values in the below final pressure equation: Final Pressure(P_f) = P_iV_i / V_f = (100 x 4) / 15 = 400 / 15 Final Pressure(P_f) = 26.67 kPa This example will guide you to calculate the final pressure manually. Case 2: Find the final volume of gas, from 8 L of gas at 150 kPa until the pressure becomes 125 kPa. P_i = 150 kPa, V_i = 8 L, P_f = 125 kPa

Step 1:

Substitute the values in the below volume equation: Final Volume(V_f) = P_iV_i / P_f = (150 x 8) / 125 = 1200 / 125 Final Volume(V_f) = 9.6 L This example will guide you to calculate the volume manually.