The Flow of Energy.

Slides:

Advertisements

Similar presentations

Thermochemistry.

Advertisements

Energy and Chemical Reactions Energy is transferred during chemical and physical changes, most commonly in the form of heat.

Thermochemistry The Basics of Heat Transfer. The Flow of Energy Thermochemistry - concerned with heat changes that occur during chemical reactions.

THERMODYNAMICS Courtesy of lab-initio.com. Definitions #1 Energy: The capacity to do work or produce heat Potential Energy: Energy due to position or.

Chapter 6 THERMOCHEMISTRY West Valley High School AP Chemistry Mr. Mata.

Thermochemistry -- The Flow of Energy: Heat -- Thermochemistry: the study of heat changes in chemical reactions Chemical potential energy: energy stored.

What’s the MATTER: Specific Heat of Matter

Unit 9 Thermochemistry Cartoon courtesy of NearingZero.net.

Section 10.2 The Flow of Energy 1.To understand how heat energy flows and how it is measured 2.To understand how substances differ in their capacity to.

Thermochemistry Heat a form of energy. can be transferred between samples heat flows from matter at a higher temperature to matter at a lower temperature.

Thermochemistry and Energy Water freezing and boiling at the same time, really?!

Thermodynamics Ch 10 Energy Sections Thermodynamics The 1st Law of Thermodynamics The Law of Conservation of Energy is also known as The 1st.

Thermochemistry and Thermodynamics

Section 10.1 Energy, Temperature, and Heat 1.To understand the general properties of energy 2.To understand the concepts of temperature and heat 3.To understand.

Energy A Give and Take The Nature of Energy Energy: the ability to do work or produce heat Potential energy (store energy): energy due to position.

Thermochemistry.

CHAPTER 10 Energy The Nature of Energy THE NATURE OF ENERGY Energy is the ability to do work or produce heat. 2 Types Potential energy: energy.

Ch. 15: Energy and Chemical Change

THERMOCHEMISTRY.

THERMOCHEMISTRY. Definitions #1 Energy: The capacity to do work or produce heat Potential Energy: Energy due to position or composition Kinetic Energy:

Thermochemistry. Do Now – Check and edit prelabs Objective – Thermochemistry Exothermic, endothermic, calorie, joule, heat capacity, and specific heat.

An Introduction into Thermodynamics Advanced Chemistry Ms. Grobsky.

Quantifying Heat The Math!.

Reaction Energy and Reaction Kinetics Chapter 17 Notes.

Thermochemistry Energy Heat Thermochemical Equations Calculating Enthalpy Change Reaction Sponteneity.

Ch 13: Solids and Liquids Ch 13 begins with notes from Ch 3.6 and 3.7 on Energy, Temperature and Heat. We did not do these sections when in Ch 3 as the.

Chapter 10: Energy Honors Chemistry. What is energy? The ability to do work or produce heat.

Energy and Chemical Reactions Energy is transferred during chemical and physical changes, most commonly in the form of heat.

THERMOCHEMISTRY. Definitions #1 Energy: The capacity to do work or produce heat Potential Energy: Energy due to position or composition Kinetic Energy:

THERMOCHEMISTRY. Definitions #1 Energy: The capacity to do work or produce heat Potential Energy: Energy due to position or composition Kinetic Energy:

Energy & Heat notes. Energy Energy is the ability to do work Energy exists in many different forms Can you think of any? Kinetic Energy Potential Energy.

Thermodynamics X Unit 9. Energy: Basic Principles  Thermodynamics – the study of energy changes  Energy – the ability to do work or produce heat Note:

THERMOCHEMISTRY. Definitions #1 Energy: The capacity to do work or produce heat Potential Energy: Energy due to position or composition Kinetic Energy:

What’s the MATTER: Specific Heat of Matter. Matter, Specific Heat of Matter At the conclusion of our time together, you should be able to: 1. Define specific.

Section 10.2 The Flow of Energy 1.To understand how energy flow affects internal energy How much energy is there in a substance? 2.To understand how heat.

THERMOCHEMISTRY. Definitions #1 Energy: The capacity to do work or produce heat Potential Energy: Energy due to position or composition Kinetic Energy:

Thermodynamics X Unit 9. Energy: Basic Principles  Thermodynamics – the study of energy changes  Energy – the ability to do work or produce heat Kinetic.

Section 10.1 Energy, Temperature, and Heat 1.To understand the general properties of energy 2.To understand the concepts of temperature and heat 3.To understand.

Energy Flow. Energy the ability to do work energy has no mass nor volume but is only detected by its effects thermochemistry studies energy changes during.

Thermochemistry. Energy Energy – the ability to do _________ or produce _________ Exists in 2 forms:  Kinetic energy – energy of _________  Potential.

Thermodynamics The study of the changes of heat in chemical reactions.

Thermochemistry -- The Flow of Energy: Heat --. Water Constants Solid 7.9 Liquid Gas 8.5.

ENERGY AND CHEMICAL CHANGE CH. 16 Energy is the ability to do work or produce heat and is found in two forms potential energy is energy due to the composition.

Energy. What is Energy? Energy is the ability to do work or produce heat Energy exists in two basic forms –Potential Energy: energy due to the composition.

Ch. 17 Thermochemistry and Energy A liquid freezing and boiling at the same time, really?!

Energy and Chemical Reactions Energy is transferred during chemical and physical changes, most commonly in the form of heat.

Chemistry Notes Energy and Heat Heat Capacity and Specific Heat.

ENERGY n The ability to do work n remains constant in amount during a chemical or physical change n energy changes occur between the system and the surrounding.

Heat capacity and Calorimetry

(17.1) Energy Transformations

Chapter 17 Thermochemistry.

THERMOCHEMISTRY.

Thermo-chemistry.

Chapter 16: Energy and Chemical Change

Discovery Lab - Energy.

Thermochemistry Study of transfers of energy as heat that accompany chemical rxns and physical changes Part 1.

Ch. 16 Energy + Chemical Change

What is it and how do we measure it?

CHAPTER 10 ENERGY.

Energy is the ability to do work or produce heat.

Thermochemistry The study of the changes in heat energy that accompany chemical reactions and physical changes.

Chapter 9 - Thermochemistry Heat and Chemical Change

Bell work Tuesday Draw the following table onto your bellwork sheet and fill in the boxes that you already know. Properties Solid Liquid Gas Amount of.

Thermochemistry Feeling hot, hot, hot.

THERMODYNAMICS Courtesy of lab-initio.com.

Ch 10 - Energy.

Energy due to position or composition (stored energy)

Thermochemistry The study of the changes in heat energy that accompany chemical reactions and physical changes.

Thermochemistry.

Presentation transcript:

The Flow of Energy

Thermodynamics Thermodynamics – the study of energy. First law of thermodynamics (law of conservation of energy) – the energy of the universe is constant. Internal Energy (E) of a system – the sum of the kinetic and potential energies of all “particles” in the system. Internal energy (E) of a system can be changed by a flow of work, heat, or both.

Internal Energy: ∆E = q + w Where ∆ (delta) means change in q represents heat w represents work Thermodynamic quantities consist of 2 parts: a number, giving the magnitude of the change a sign, indicating the direction of the flow (from the system’s point of view)

q = heat flowing into or out of the system -q if energy is leaving to the surroundings (exothermic) +q if energy is entering from the surroundings (endothermic)

w = work done by, or on, the system -w if work is done by the system on the surroundings (exothermic) +w if work is done on the system by the surroundings (endothermic)

Measuring Energy Changes Common units of energy: the calorie and the joule. Calorie – amount of energy (heat) required to raise the temperature of 1 gram of water by 1oC. The “calorie” with which you are familiar is used to measure the energy content of food and is actually a kilocalorie (1000 calories), written with a capital C (Calorie) to distinguish it from the calorie used in chemistry. Joule (an SI unit) – defined in terms of the calorie: 1 calorie = 4.184 joules Abbreviated 1 cal = 4.184 J You will need to be able to convert between the two units.

Calculating Energy Requirements Let’s say we want to determine how much energy is required to change the temperature of a substance, what calculation would be required? Energy (heat) required (q) = mass (g) x Specific heat capacity (J/g oC) x ∆T (oC) Specific heat capacity – the amount of energy required to change the temperature of one gram of a substance by one Celsius degree. Each substance has its own specific heat capacity.

Different substances respond differently to being heated. For example, it takes 4.184 J of energy to raise the temperature of 1 gram of water 1oC. In contrast, the same amount of energy applied to 1 g of gold raises its temperature by approximately 32oC!! Some substances require large amounts of energy to change their temperatures whereas others require small amounts. The specific heat capacities for several substances are in the table. Notice water has a very high specific heat. This is why lakes and seas are so much slower to respond to cooling or heating than are the surrounding land masses.