Temperature Heat and Expansion Specific Heat Capacity Specific










- Slides: 10

Temperature, Heat, and Expansion

Specific Heat Capacity • Specific materials require of a given by a specified • Absorbed energy of the material ▫ if energy of molecules, leads to ▫ May also of molecules, within molecules, or bonds (NOT measures of temperature) ▫ temperature = a measure of ▫ Only part of by substance raises its

• The specific heat capacity of any substance is defined as the to raise the of a unit of the substance by • e. g. water v. iron: • water takes • Iron takes • Water of energy to raise the per gram than iron for the same • Specific heat equates to ▫ Inertia: object’s resistance to ▫ Thermal inertia: object’s resistance to

Water’s High Specific Heat Capacity • A small amount of water for a small ▫ Useful as a cooling agent ▫ i. e. in automobiles & other engines • Also, water • This property of water affects climate in many places ▫ Sea breeze ▫ Land breeze

Thermal Expansion • Temperature move ▫ results in ▫ all forms of matter when ▫ gases ▫ , molecules when and much more than solids • Useful information for concrete sidewalks, highway paving, and freeway/bridge building

• Different materials ▫ Bimetallic strip: or riveted together ▫ Strip is , ▫ Useful in are welded is seen �Bimetallic coil �Room cold – coil bends electric switch and �Room hot – coil bends electric switch and • Amount of and closes and opens depends on

Expansion of water • Unlike most other liquids, , 0°C, when temperature is increased • Water between and , then it begins to • continues until , 100°C • Water has its (greatest ) at 4°C • Same amount of has its largest (smallest ) in form (ice)

WHY? !? • Unlike other solids, ice has of of water molecules ▫ molecules than in the liquid state ▫ ice is b/c of space water • This explains the contraction of water between 0°C and 4°C ▫ ▫ Then,

NATURE • Densest water settles at ▫ 4°C above freezing temperature • Water at freezing point • As water is cooled at surface, Only then can surface water cool to • Because of water’s and , the bottom of deep bodies of water is a

• Read p 318 • Do T/E p 323 #1, 2, 7, 15 ▫ Make sure you not only answer each question…but also EXPLAIN your answer
Specific heat capacity graph
Chapter 21 temperature heat and expansion
"atlantic crystals" miami or florida or construction
Chapter 21 temperature, heat and expansion answer key
Chapter 21: temperature, heat, and expansion answer key
Chapter 21 temperature heat and expansion
Chapter 21 temperature heat and expansion
Heat capacity units
Specific heat of sugar
Specific heat capacity of ice cream
How to find the specific heat capacity