Heat
Heat - Heat is the form of energy which sensation of hotness and coldness Temperature- Temperature is the measurement of average energy of molecular motion in a substance. Heat transfer- The Energy is flow from higher Temperature body to lower temperature body. Unit of Heat- SI unit of Heat is Joule Calorie- It is a traditional unit of Heat. One Calorie is defined as the amount of heat required to raise the temperature if 1 g if water by 1 Degree Celsius. Note- 1 Joule= 0.24 Calorie Effect of Heat 1. Change in temperature 2. Change in state of matter Evaporation The change of a substance from the liquid state to its gaseous state by absorbing heat from the surrounding at any temperature below its boiling point is called evaporation. Factor affecting Evaporation 1. Surface area 2. Temperature of surrounding 3. Temperature of the substance 4. Nature of liquid 5. Wind Speed 6. Humidity Boiling- The process in with Liquid change into vapo