Physics 100

Chapt 9

Temperature & heat

Temperature scales

Fahrenheit

212 F

32 F

- 459 F

room temp 27 C 300 K 80 F

Temperature avg KE

Thermal atomic motion

Heat energy= KE and PE associated with the random thermal motion of atoms

Air solid

Summary

• Heat is energy associated with random motion of atoms & molecules in material

• Temperature tells you the average “thermal” energy (including KE & PE) of atoms & molecules

• At absolute zero (T=0K, or -273C, or -459F) motion of atoms & molecules in material ceases.

Fahrenheit

212 F

32 F

- 459 F

80 F 27C 300 KRoom temp