Absolute Zero -the coldest possible temperature is called absolute zero -this is measured on the Kelvin scale (K); note: there are no negative temperatures on the Kelvin scale -the lowest temperature would be 0 K = −273.15°C; at this point, all atomic and molecular motion stops -Kelvin temperature is specified without the degree symbol Conversion between Kelvin and Celsius: Kelvin = 273 + °C

Absolute Zero -higher kinetic energy  higher Kelvin temperature -kinetic energy is also affected by pressure and volume -At 0 K all motion stops, meaning that the average kinetic energy equals zero. ***Standard temperature is 0°C, and standard pressure (STP) is 1 atmosphere (760 mm Hg)***

Charles’ Law - Assumes constant concentration of gas and pressure - Temperature MUST be in Kelvin - volume and temperature increase together directly proportionally ex. if volume doubles, temperature doubles - volume and temperature decrease together directly proportionally ex. if volumes halves, temperature is halved

Charles’ Law Problems Answer the following questions: What will happen to the temperature if you triple the volume of a gas? What will happen to the volume if you quarter the temperature of a gas? What will happen to the temperature at 500 K if the volume of a gas changed from 200 mL to 400 mL? What will happen to the volume of a gas at 300 L if the temperature changes from 273 K to 136.5 K? What will happen to the volume of a gas at 600 L if the temperature changed from 273°C to 0°C?