Themes > Science > Chemistry > Inorganic Chemistry > More Information About Gas Laws > The Gas Law > Boyle's Law Boyle's Law: used when the pressure of a gas changes. At constant temperature, pressure exerted by a gas varies inversely with its volume. If the volume of a container decreases, pressure of the gas increases. If the volume of a container increases, pressure of the gas decreases. Boyle's Law is expressed by the equation: Portfolio Assignment 211: Scoring criteria Do the following conversions: 27 K to Celcius 1450 oC to K 1.25 atmospheres to inches of Hg 500 millimeters of Hg to kPa Convert your answer in d to millibars. Work the following Boyle's Law practice problems: 10 dm3 of a gas are collected at STP. What will be the volume if the pressure changes to 9.5 kPa while the temperature remains unchanged? What is the volume occupied by 5 dm3 of a gas at STP if the pressure increases to 500 kPa and the temperature remains constant? 90 cm3 of a gas are collected at 97.5 kilopascals. If the temperature does not change, at what pressure will the volume be 70 cm3? Day 2 Information provided by: http://pc65.frontier.osrhe.edu