Lecture #1 Heat of a System

Slides:

Advertisements

Similar presentations

Thermochemistry Study of heat in chemical reactions. Heat will travel between a system and its surroundings Heat is measured in Joules (J) Metric  English:

Advertisements

Unit 2 – Matter and Energy Mrs. Callender. Lesson Essential Question: What is Thermochemistry?

Energy and Specific Heat Date:. Energy The ability to do work Multiple forms of energy We are going to focus on heat, q.

What’s the MATTER: Specific Heat of Matter

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

Heat and TemperatureSection 2 Specific Heat Capacity specific heat capacity (c): The amount of heat required to raise the temp. of one gram of a specific.

Specific Heat mC  T. Specific Heat The amount of heat energy a material requires to raise its temperature is a characteristic that can be used to identify.

What does temperature measure? What does pressure measure?

Thermal Energy.

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.

Thermochemistry Energy Heat Thermochemical Equations Calculating Enthalpy Change Reaction Sponteneity.

Thermochemistry Some like it hot.... Forms of Energy Potential Energy (gravitational, magnetic, chemical) Kinetic Energy Work Light Heat.

Thermochemistry Some say the world will end in fire, Some say in ice, From what I’ve tasted of desire I hold with those who favor fire. Robert Frost Fire.

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.

Specific Heat Capacity. deals with heat changes that occur during chemical reactions deals with heat changes that occur during chemical reactions Heat.

2. The law of __________ of _____ states that in any chemical or physical process, _____ is neither created nor destroyed.

Specific Heat Capacity. deals with heat changes that occur during chemical reactions deals with heat changes that occur during chemical reactions Heat.

1 Matter and Energy Chapter 3. 2 Properties Characteristics of the substance under observation Properties can be either ¬directly observable or the manner.

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.

Thermochemistry (The study of energy transfers) Mr. Forte Atascadero High School.

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.

Kinetic Energy Energy an object possesses when in motion. Law of Conservation of Energy – in any physical or chemical change, energy can change form,

Section 10.2 The Flow of Energy 1.To convert between different energy units. 2.To understand the concept of heat capacity. 3.To solve problems using heat.

Heat energy is measured in units called joules or calories. 1 calorie is the amount of heat energy needed to raise the temperature of 1.0 g (mL) of water.

Specific Heat Quantity of energy needed to increase the temperature of one gram of a substance by one degree Celsius/Kelvin Every substance has its own.

 Different substances require different amounts of heat to change their temperature.  Objects that require more energy have a high heat capacity like.

Chemistry Notes Energy and Heat Heat Capacity and Specific Heat.

Heat capacity and Calorimetry

Energy transfer varies from reaction to reaction.

(17.1) Energy Transformations

You and your partner: Get 1 baggie with a scoop of LiCl

Chapter Eleven: Heat 11.1 Heat 11.2 Heat Transfer.

Thermochemistry.

Thermochemistry is the study of energy changes that occur during chemical reactions and phase changes (changes of state)

Heat and Energy.

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

Thermochemistry: The study of heat changes that occur during chemical reactions and physical changes of state.

SPECIFIC HEAT & CALORIMETRY

Temperature and Heat Unit Conversions

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?

Heat Capacity and Specific Heat

CHAPTER 10 ENERGY.

The Flow of Energy.

Energy Content in Foods

Energy is the ability to do work or produce heat.

Specific Heat Capacity

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

Calculations of Thermochemistry

Chapter 16 Thermochemistry

Ch10 Energy & Causes of Change

Thermochemistry Lecture 1.

Weather Dynamics: Energy and Water Ch 13

Thermal Energy and Heat

Warm-up What is the final temperature of a 25.0 g piece of metal if it absorbs 1122 joules of heat and its specific heat capacity is J/g°C? The.

Thermochemistry Feeling hot, hot, hot.

Topic 16: Energy and Chemical Change

Chapter Eleven: Heat 11.1 Heat 11.2 Heat Transfer.

THERMODYNAMICS Courtesy of lab-initio.com.

Thermochemistry: The study of heat changes that occur during chemical reactions and physical changes of state.

Unit 7: Thermochemistry Calculations Phase Change and q=mcΔT

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

Partner Talk… It is a warm day and you go to the park. Is everything going to feel the same? Why/Why not?

Heat Transfer Changes in Temperature

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

Chapter 16 Preview Objectives Thermochemistry Heat and Temperature

Heat and Temperature.

Presentation transcript:

Lecture #1 Heat of a System ThermoChemistry Lecture #1 Heat of a System

What is Heat? It is a form of energy that can be converted to other forms of energy. As energy, it can be defined as the capacity to do work. From Physics, it is measured in units of Joules

Why do we care about Heat? Because many physical changes and all chemical changes involve the movement of heat either in or out of a defined system.

Calculation of Heat Content This one is quite simple. The equation that will be used is as follows: q = m  C  T Where: q is the actual heat content of the system measured in Joules C is something called the “specific heat” of the system And T is the temperature of the system measured in degrees Celsius.

So what is this “Specific Heat” ? It is a nature-given characteristic of a pure substance – so it is a physical property. It is defined as the amount of heat flow necessary to cause a 1 degree Celsius temperature change in exactly 1 gram of a pure substance. As an example – it would be the amount of heat that would have to be added to 1 gram of water to cause the temperature to increase by exactly 1 °C. For water, the specific heat is 4.18 J / g °C

So… It would take the addition of 4.18 Joules of heat to cause 1.0 gram of water to change temperature by 1.0 degree Celsius. Note that it does not matter where that 1 degree change is on a thermometer.

The Heat Pyramid q m C T