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Unformatted text preview: Energy- capacity to do some kind of work, always involved when there is a change in matter- melting,boiling,and chemincal change. Physical change- change in matter affects only physical properties. *grinding,cutting,melting,boiling* Chemical change- change when one or more sub. change into new sub. With diff. properties. (cooking,burning,rust,spoils,kertle,racid,scum,mold). Change in matter , energy is absorbed from surroundings to a system is endothermic . “” same as above “”energy released from system to surrounding is exothermic . Sublimation-solid-gas, Deposition-gas-solid/ dry ice is iodine Law of conservation of energy-neither created nor destroyed. To keep track of energy chemists use terms system and surroundings. Energy exists in different forms- ( mechanical,sound,solar,wind,hydroelectric,radiant) all kinetic others are ( chemical,light,heat,nuclear,electrical ) Temp. is defined as measurement of average kinetic energy of random motion of particles in a sub. . No negative values in Kelvin, zero point-absolute zero-no kinetic energy. C=k-motion of particles in a sub....
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- Spring '08
- 1g, 1 K, 273K, Silver Ag, Homeogeneous