Presentation on theme: " Avg. KE of an object’s particles Fast particles = High KE = High temp. Slow particles = Low KE = low temp. Units - ⁰F, ⁰C, K (Kelvin) Kelvin."— Presentation transcript:
Avg. KE of an object’s particles Fast particles = High KE = High temp. Slow particles = Low KE = low temp. Units - ⁰F, ⁰C, K (Kelvin) Kelvin – absolute temp. scale Absolute zero – lowest possible temp. ▪ 0 K = -273 ⁰C = -459 ⁰F ▪ No particle movement = no KE = no temp.
Total energy of an object’s particles (PE + KE = TE) TE increases when temp. increases – particles have more KE, so they have more TE. TE decreases when temp. decreases – particles have less KE, so they have less TE TE increases w/ more mass (more particles) TE decreases w/ less mass (fewer particles) Unit – Joules (J)
Transferred TE due to differences in temp. Heat always naturally flows from higher temps to lower temps Flows from hot to cold. Can flow cold to hot if work is done (AC, refrigerator) Cold is the lack of or absence of TE. Unit – Joule (J)
Which has more thermal energy: a hot cup of coffee or an iceberg?
Even though the hot coffee has a higher temperature, the iceberg has more thermal energy. The iceberg has more TOTAL ENERGY and, therefore, THERMAL ENERGY because it has more mass.