"Specific Heat Capacity" Heat and Energy PPT Courseware

Description

"Specific Heat Capacity" Heat and Energy PPT Courseware

Exchange and discussion

(1) Which one requires more heat to boil a pot of water or to boil half a pot of water?

Reason: At the same temperature, the mass of a pot of water is greater

(2) Who needs more heat to boil a pot of water into warm water or boiling water?

Reason: The quality is the same, but the temperature rises higher when boiling water.

in conclusion:

The absorption of heat by the same substance is related to its mass and rising temperature;

At the same temperature, the greater the mass, the more heat is absorbed.

With the same mass, the greater the temperature rise, the more heat is absorbed.

Explore the heat-absorbing abilities of different substances

Experimental design: How to compare the heat absorption capabilities of water and iron?

Option 1: Heat water and iron powder with the same mass so that they rise to the same temperature and compare the absorption amounts.

Option 2: Heat water and iron powder with the same mass so that they absorb the same amount of heat and compare the increase in temperature.

Specific heat capacity

Concept: The heat absorbed (released) by unit mass of a certain substance when the temperature increases (decreases) by 1°C is called the specific heat capacity of the substance.

Unit: J/(kg·℃)

The symbol is J/(kg · ℃)

Read as: Joules per kilogram Celsius

Specific heat capacity is a physical property (property) of a substance.

Example 1. The temperature of an iron block decreases, indicating that its ( )

A． Calories reduced

B. Specific heat becomes smaller

C． Mechanical energy is reduced

D. Internal energy decreased

Example 2. In winter, many indoor heaters use flowing hot water to slowly flow through the radiator. The reason is ( )

A． Water is cheaper B. The density of water is small

C． The specific heat of water is large D. water has high boiling point

Example 3. Regarding temperature, heat, and specific heat capacity, which of the following statements is correct ( )

A． Objects with higher temperatures contain more heat

B. The higher the temperature, the greater the specific heat capacity of an object.

C． The more heat absorbed, the greater the specific heat capacity of the substance

D. When an object absorbs heat, its temperature does not necessarily rise

summary:

Specific heat capacity: definition; physical meaning

Calculation formula: endothermic and exothermic

Calculation: Find each physical quantity in the formula

Thoughts after class: If you want to measure the specific heat of an object, what is the principle of the experiment? What physical quantities should be measured? What measuring tools are needed?

Keywords: heat and energy teaching courseware, specific heat capacity teaching courseware, Lujiao version ninth grade physics PPT courseware download, second volume, ninth grade physics slide courseware download, heat and energy PPT courseware download, specific heat capacity PPT courseware download, .PPT format;

For more information about the "Heat and Energy Specific Heat Capacity" PPT courseware, please click on the Heat and Energy ppt Specific Heat Capacity ppt tab.

"Studying the Specific Heat Capacity of Substances" Internal Energy and Heat Engine PPT Courseware 4:

"Studying the Specific Heat Capacity of Substances" Internal Energy and Heat Engine PPT Courseware 4 What factors may determine the amount of heat absorbed by a certain substance when it heats up? What is the relationship? Does it take the same amount of heat to boil a full pot of water as it does to boil a half pot? Not the same amount, the amount of heat required to fill a pot of water...

"Studying the Specific Heat Capacity of Substances" Internal Energy and Heat Engine PPT Courseware 3:

"Studying the Specific Heat Capacity of Matter" Internal Energy and Heat Engine PPT Courseware 3 Teaching Objectives: 1. Understand the concept of specific heat capacity, know that specific heat capacity is a property of matter, a physical quantity that reacts to the endothermic and exothermic properties of matter, and know the units and readings of specific heat capacity Law and meaning. 2.Specific heat..

"Studying the Specific Heat Capacity of Substances" Internal Energy and Heat Engine PPT Courseware 2:

"Studying the Specific Heat Capacity of Substances" Internal Energy and Heat Engine PPT Courseware 2 1. What is heat? What is the unit? What letters represent calories? The amount that can be changed in an object during the heat transfer process is called heat. The unit is J. Heat is represented by Q. 2. What is the calorific value of fuel? What is calorific value used for...

File Info

Update Time: 2024-10-03

This template belongs to Physics courseware Lu Jiao Edition Ninth Grade Physics Volume 2 industry PPT template

Preview