The document discusses key concepts relating to heat and temperature. It defines heat as the spontaneous flow of energy from objects at a higher temperature to those at a lower temperature. Temperature is defined as the degree of hotness or coldness of a body. Different temperature scales such as Fahrenheit, Celsius, and Kelvin are also discussed. The document also covers heat capacity, specific heat capacity, and the various effects of heat such as expansion, changes in temperature and state, and chemical changes.

1. LEVEL-2
NAME : S. KAYAL VIZHI
REG. NO. : 1122119BD059
MAJOR : PHYSICAL SCIENCE

2. Observe the below pictures.
What is common in all the
pictures?

3. HEAT &
TEMPERTATURE

5. Spontaneous flow of energy
from the object at higher
temperature to the lower
temperature
SI Unit of heat – joule
Denoted by the symbol “J”

7.  Degree of hotness or coldness of a body
 SI unit of temperature – kelvin
 Denoted by the symbol “K”
 Day to day applications, Celsius (0C) is used
 Measured with a thermometer
TEMPERATURE SCALES
Fahrenheit scale
Celsius or Centigrade scale
Kelvin or Absolute scale

12. HEAT CAPACITY
SPECIFIC HEAT CAPACITY

16. EFFECTS OF HEAT
 Expansion
 Change in
Temperature
 Change in State
 Chemical Changes

28. SUMMARY
 Heat
 Temperature
 Modes of Heat Transfer
 Heat capacity
 Specific Heat Capacity
 Molar Heat Capacity
 Effects of Heat
 Change of Phase