Chapter Seventeen Page 504. Assess prior knowledge… What does a thermometer measure? Can a thermometer measure heat?

Slides:



Advertisements
Similar presentations
Intro to Thermodynamics Mr Nelson – Energy Energy is the ability to do work or transfer heat. –Energy used to cause an object to move is called.
Advertisements

Chemistry 17.1.
Thermochemistry.
Chapter 17 – Thermochemistry 4-1
Aim: What is thermochemistry?. Law of Conservation of Energy In any chemical or physical process, energy is neither created nor destroyed. There are different.
Thermochemistry The Basics of Heat Transfer. The Flow of Energy Thermochemistry - concerned with heat changes that occur during chemical reactions.
Laboratory 12 CALORIMETRY. Objectives 1.Construct and utilize a coffee cup calorimeter to measure heat changes 2.Determine the heat capacity of a calorimeter.
Thermochemistry -- The Flow of Energy: Heat -- Thermochemistry: the study of heat changes in chemical reactions Chemical potential energy: energy stored.
CHAPTER 17 THERMOCHEMISTRY.
Chemical Reactions That Involve Heat Objectives: 1. Describe the difference between exothermic and endothermic reactions. 2. Explain the relationship between.
Energy Transformations Thermochemistry is the study of energy changes that occur during chemical reactions and changes in state. The energy stored in the.
Intro: The Flow of Energy
What’s the MATTER: Specific Heat of Matter
Chapter 17 Thermochemistry
 Respond to at least One question below using the organizer provided. Be prepared to share your thoughts  QUESTIONS:  1. Describe what happens to a.
Unit 9 Thermochemistry Cartoon courtesy of NearingZero.net.
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.
Energy and Heat 15.1 and 15.2 (pgs. 516 – 528). Main Idea… Energy can change form and flow, but it is always conserved The enthalpy change for a reaction.
Thermochemistry and Energy Water freezing and boiling at the same time, really?!
What does temperature measure? What does pressure measure?
TEKS 11B: Understand the law of conservation of energy and the processes of heat transfer. What are the ways in which energy changes can occur? Thermochemistry.
T HE U NIVERSITY O F Q UEENSLAND Foundation Year THERMOCHEMISTRY I.
Thermochemistry Energy Heat Thermochemical Equations Calculating Enthalpy Change Reaction Sponteneity.
Thermochemistry Chapter 17.
The Flow of Energy. Think about this question for 15 seconds… What does a thermometer measure? Discuss with your neighbor what your answer is Share what.
Chapter 10 Energy. Section 10.1 The Nature of Energy Return to TOC Copyright © Cengage Learning. All rights reserved 2 Energy is anything that has the.
Thermochemistry.
Chapter 11: Thermochemistry – Heat and Chemical Change
Unit 13: Thermochemistry Chapter 17 By: Jennie Borders.
CHAPTER 17 THERMOCHEMISTRY. ENERGY Energy is the capacity to do work or to supply heat. Various forms of energy include potential, kinetic, and heat.
Thermochemistry. Do Now – Check and edit prelabs Objective – Thermochemistry Exothermic, endothermic, calorie, joule, heat capacity, and specific heat.
Thermochemistry Energy Heat Thermochemical Equations Calculating Enthalpy Change Reaction Sponteneity.
The Flow of Energy-Heat Energy and Heat. Energy Energy is weightless, odorless, and tasteless Gasoline is an example of chemical potential energy Different.
1.As much as you can, compare and contrast the animal and plant cell. 2.Compare mitosis and meiosis. 3.Translate to other DNA strand: GAC CTA GGT ACT 4.Translate.
Thermochemistry Some Like It Hot!!!!!. The Flow of Energy ► Thermochemistry – concerned with heat changes that occur during chemical reactions ► Energy.
Thermochemistry. Thermodynamics Study of energy transformations Thermochemistry is a branch of thermodynamics which describes energy relationships in.
THERMOCHEMISTRY Specific Heat Thermochemistry 17.1  Thermochemistry is the study of energy changes (HEAT) that occur during chemical reactions and changes.
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.
Chapter 11 Section 1 Thermochemistry -study of heat changes that occur during chemical reactions energy- ability to do work or supply heat -unlike matter,
The Flow of Energy Heat and Work Chapter 17, Section 1 Heat and Work Chapter 17, Section 1.
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.
Chapter 17: Thermochemistry
Thermochemistry. Chemical reactions involve changes in energy Breaking bonds releases energy Forming bonds requires energy The energy involved in chemistry.
Thermochemistry -- The Flow of Energy: Heat --. Water Constants Solid 7.9 Liquid Gas 8.5.
Ch. 17 Thermochemistry and Energy A liquid freezing and boiling at the same time, really?!
Thermochemistry Chapter 10. Warm Up A deep underground cavern contains 2.24 X 10 6 L of methane gas at a pressure of 1.50 x 10 3 kPa and the temperature.
Slide 1 of 34 Chemistry © Copyright Pearson Prentice Hall Slide 2 of 34 The Flow of Energy—Heat and Work The temperature of lava from a volcano.
17.1 The Flow of Energy > 1 Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. Day Question of the Day Relative to other.
Chapter 17 Thermochemistry 17.1 The Flow of Energy
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.
17.1 The Flow of Energy > 1 Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. Chapter 17 Thermochemistry 17.1 The Flow of Energy.
Chemistry 17.1.
(17.1) Energy Transformations
Chapter 17 Thermochemistry.
Thermo-chemistry.
Ch. 16 Thermochemistry Notes
Chapter 17 Thermochemistry 17.1 The Flow of Energy
Chapter 17 “Thermochemistry”
CHAPTER 10 ENERGY.
Energy Chapter 16.
Chapter 17 Thermochemistry
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.
Energy Transformations
The Flow of Energy— Part one
Thermochemistry Feeling hot, hot, hot.
Thermochemistry.
Thermochemistry Chapter 17 Chemistry.
Warm Up #1 What is a catalyst?
The Flow of Energy.
Entropy and Free Energy Thermochemistry
Presentation transcript:

Chapter Seventeen Page 504

Assess prior knowledge… What does a thermometer measure? Can a thermometer measure heat?

Energy Transformations Energy is the capacity for doing work or supplying heat. Energy is not matter – it is detected because of its effects Thermochemistry is the study of energy changes that occur during chemical changes or changes in state. All matter has a certain amount of energy stored within it. This is referred to as chemical potential energy. It is based on the substance's atomic structure.

Energy Transformations (cont'd) Can you think of substances we purchase that house significant chemical potential energy? Energy changes occur as work, heat or a combination of both. Heat (q), is energy that transfers from one object to the next because of temperature differences between the two. Adding heat (energy) causes a rise in the temperature.

Heat HEAT ALWAYS FLOWS FROM A WARMER OBJECT TO A COOLER OBJECT. THE BOLD BLACK LETTERS MEANS THE STATEMENT IS REALLY, REALLY IMPORTANT. Does the heat transfer continue indefinitely?

Heat Transfer When it comes to heat transfer, the terms system and surroundings are often used The system is the object or part of the universe you focus your attention on The surroundings is everything else (when it comes to heat transfer, it is typically the 'immediate surroundings'). Thermochemistry is concerned with the heat flow between the system and its surroundings. If we rely on the law of conservation of energy, when the system loses energy, the surroundings must gain energy and vice versa.

Endothermic Processes The system absorbs heat and the surroundings cool down. Heat is defined as positive (+q). To help you remember, endo- means "within". Exothermic Processes The system releases heat and the surroundings warm up. The heat is defined as negative (-q). The prefix exo- means "outside of" Page 507, Q

Units for Measuring Heat Flow Heat flow is measured in two common units, the calorie (cal) and the joule (J). The joule is the SI unit for energy. One joule of heat raises the temperature of 1g of water °C 1 J = cal4.184 J = 1 cal

Heat Capacity and Specific Heat The amount of heat needed to raise the temperature of an object by 1°C is called its heat capacity. It depends on its mass and chemical composition. The greater the mass, the greater its heat capacity. Why does the parking lot at Walmart heat up faster than a swimming pool? Specific heat is merely an extension of heat capacity It is the amount of heat it required for 1g of substance to raise its temperature by 1°C. Table 17.1, page 508

To calculate specific heat (C): heat (joules or calories) mass (g) x change in temperature (°C) the units of specific heat are then… J/g·°Corcal/g·°C Questions 3-4, 9-11, pg. 510