what will happen if the temperature of the system is reduced to 150 k and the pressure remains same? the piston will move upwards because the gas particles will move farther apart. the piston will move downwards because the gas particles will start moving faster. the piston will move upwards because the gas particles will hit the walls of the container with less force. the piston will move downwards because the intermolecular distance between the gas particles will be reduced.