CHAPTER5 EFFECTS OF HEAT. Effects of heat Melting point Boiling point Expansion and Contraction The Bimetallic strip Expansion of liquids and gases Thermometer.

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Presentation transcript:

CHAPTER5 EFFECTS OF HEAT

Effects of heat Melting point Boiling point Expansion and Contraction The Bimetallic strip Expansion of liquids and gases Thermometer Measurement of heat Calorimeter

Change of state-The changing of solid into liquid and a liquid into a gas on heating is called change of state. Solid-liquid-gases

Melting Point The temperature at whichsolid substance changes into a liquid is called Melting Point Water has a melting point of 0c.

Boiling point The temperature at which liquids starts to boil is called Boiling Point. Water boils at a temperature of 100c Boiling point and freezing point are same

Expansion of solids Most substanses expand on heating that means their length and volume increases and contract when cooled.

Expansion of liquids

Expansion of gases

Thermometer

Measurement of heat Heat capacity Specific heat Kilocorie Calorie

Calorimeter It is used to find out specific heat of water.

Question hour 1Define melting point,boiling point,heat capacity,specific heat,calorie,kilocalorie 2Explain mercury is used in a thrmometer. 3Where is a calorimeter is used? 4Water is an excellent coolent.