20 cubic inches of a gas with an absolute pressure of 5 psi is compressed until its pressure reaches 10 psi. What's the new volume of the gas? (Assume that there's no change in temperature.)
10 cubic inches We will use Boyle's law that states that for a fixed amount of an ideal gas kept at a fixed temperature, pressure and volume are inversely proportional. P1 V1 = P2 V2 Where P1 is initial pressure = 5 psi V1 is initial volume = 20 cubic inch P2 is final pressure = 10 psi V2 is final volume = unknown V2 = P1,V1 / P2 V2 = 20 × 5 / 10 V2 = 100/10 V2 = 10 cubic inches
