'Absorbs heat' diaporamas de présentation

Thermal Energy & Heat

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Chapter 17 The Flow of Energy

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Thermochemistry

Thermochemistry. When energy is changed from one form to another, all of the energy can be accounted for. This is called the Law of Conservation of Energy. Heat is energy. If heat is released by a chemical system, an equal amount of heat will be absorbed by the surroundings.

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Preview

Preview. Section 1 Relationships Between Heat and Work Section 2 The First Law of Thermodynamics Section 3 The Second Law of Thermodynamics. Thermodynamics. What do you think? .

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Chemistry and Energy

How are they related?. Chemistry and Energy. Energy Encountered Daily. What is Energy?. Defined as the ability to do work or create heat. Many types of energy Thermal Light Gravitational Kinetic Potential. Light Energy Review. How is light energy produced?

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Example 3.1 Classifying Matter

Example 3.1 Classifying Matter. Classify each type of matter as a pure substance or a mixture. If it is a pure substance, classify it as an element or a compound; if it is a mixture, classify it as homogeneous or heterogeneous. (a) a lead weight (b) seawater (c) distilled water

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Thermal Energy

Thermal Energy. Thermal Energy. Measurement related to the quantity of molecules. the total of all the kinetic and potential energy of all the particles in a substance. Thermal Energy Relationships

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FIGURE 4-8 We can cause matter to change state by adding or removing heat.

FIGURE 4-1 Heat always moves from hot to cold. In this example, it will travel from the fire to the cooler water and from the hand to the cooler ice.

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Introduction to Thermodynamics and Kinetics

Introduction to Thermodynamics and Kinetics. Topics. Types of energy and units of energy exothermic vs. endothermic reactions heat capacity and specific heat energy transfers in changes of state calorimetry enthalpy and entropy Kinetics and catalysts

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CHAPTER - 1 MATTER IN OUR SURROUNDINGS

CHAPTER - 1 MATTER IN OUR SURROUNDINGS. CLASS :- IX MADE BY :- VIKAS YADAV SCHOOL :- K.V. MSMD. 1a) Matter :-. Matter is anything which occupies space and has mass. b) Classification of matter :-

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Second Law of Thermodynamics Engines and Refrigerators

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CHAPTER - 1 MATTER IN OUR SURROUNDINGS

CHAPTER - 1 MATTER IN OUR SURROUNDINGS. CLASS :- IX -A MADE BY :- SRI YASHWANTH SCHOOL : -SNS Academy. 1a) Matter :-. Matter is anything which occupies space and has mass. Eg: chair, perfume(not the smell from the perfume) b) Classification of matter :-

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The Atmosphere

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FIGURE 6-2 The components of an automotive heater system. (Courtesy of Everco Industries)

FIGURE 6-1 Winter presents a heat load: Heat must be added for comfort (right). Summer presents a cooling load. FIGURE 6-2 The components of an automotive heater system. (Courtesy of Everco Industries).

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Measuring Heat

reaction. reaction. Measuring Heat. Exothermic reaction, heat given off & temperature of water rises. Endothermic reaction, heat taken in & temperature of water drops. Calorimetry : the accurate and precise measurement of heat change for chemical and physical processes.

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Thermochemistry I

Thermochemistry I. Exothermic, Endothermic, specific heat, heating/ cooling curves. In thermodynamics, the term exothermic is a chemical reaction or process that releases energy in the form of light or heat. Expressed in a chemical equation: reactants ? products + energy

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Changes

Changes. Exothermic vs. Endothermic. Changes. Exothermic vs Reaction that releases heat. Endothermic-Absorbs heat. Heat versus temperature. HEAT (q) Measure of the total energy in a substance

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Enthalpy (H) and Change in Enthalpy ( ? H )

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