Pressure A. _______ (P) is defined as the _____ per unit ____ on a surface. It is defined by the following formula: Pressure = Force Area Pressure forcearea

Pressure 1. The ____________--the blanket of air surrounding Earth—exerts pressure. The pressure of the ____________ can be thought of as caused by the weight of the gases that compose the atmosphere. atmosphere

Pressure a. ____________ pressure is the sum of the individual pressures of the various gasses in the atmosphere. Atmospheric

Pressure 2. A ___________ is a device used to measure atmospheric pressure. barometer

Pressure B. There are many units for pressure including, _____________(atm), ____________________(mmHg), _________________, and more!. atmospheres millimeters mercury kilopascals

Pressure Relationships between Different Units of Pressure (at 0°C) 1atm = 760mmHg = kPa

Temperature A. Temperature is a measure of the average _______ _______ of the particles in a sample of matter. KINETICENERGY

Temperature 1. At the same temperature, lighter gases move, on average, ______ than heavier gases. FASTER

Temperature

B. The _________ (°C) scale is the temperature scale in which water freezes at ___ degrees Celsius and boils at ___ degrees Celsius. CELSIUS 0 100

Temperature C. The _________ (K) scale is the absolute temperature scale used in the scientific community (There are no negative values on the Kelvin scale). Water freezes at _____K and boils at ______ K. KELVIN

Temperature 1. __________ _____ is the theoretical lowest temperature possible at which all molecular motion stops. ABSOLUTEZERO

Temperature 2. To convert between Celsius and Kelvin use the formula ______________. K= °C + 273

STP A. For purposes of comparison, scientists have agreed on standard conditions of exactly ______ pressure and ____ for temperature. These conditions are called __________ _____________ ____ _________ and are commonly abbreviated ____. 1 atm 0°C standard temperatureandpressure STP