HEATING AND COOLING CURVES. What are some things that happen as we heat a sample up? Solid  Liquid  Gas Melting, Evaporating.

Slides:

Advertisements

Similar presentations

Unit 1 ENERGY 1.1 How do you read a heating and cooling curve?

Advertisements

1 Chapter 2Energy and Matter 2.6 Changes of State Copyright © 2009 by Pearson Education, Inc.

Heating/Cooling Curve & Energy Calculations. Which of the following measures the average kinetic energy of a sample? 1.Mass 2.Volume 3.Specific heat 4.Temperature.

Phase Changes What did one water molecule say to another water molecule about vapor? Don’t worry it’s just a phase he’ll cool down.

Aim: How to measure energy absorbed during a phase change

Heating and Cooling Curve. Heating Curve Is a graph of heat added versus temperature Is useful in describing the change in temperature and the amount.

Heating and Cooling Curve Definitions: Specific Heat: Amount of energy required to raise the temperature of 1 gram of a substance by 1⁰ Celsius Enthalpy.

For this heating curve, energy was added at a constant rate. This is obvious in regions where the temperature steadily increases (AB ; CD ; EF). In these.

Calorimetry How to use math to describe the movement of heat energy Temperature Change Problems Temperature Change Problems Phase Change Problems Phase.

Energy Requirements for changing state: In ice the water molecules are held together by strong intermolecular forces. The energy required to melt 1 gram.

Energy Chapter 2 Section 1.

Thermal Properties of Matter

Fahrenheit (°F) Celsius (°C) Kelvin (K) Fill in the chart below using your Earth Science Reference Tables.Earth Science Reference Tables

Chemistry Calculating Heat.

Basic Chemistry Copyright © 2011 Pearson Education, Inc. 1 Chapter 10 Structures of Solids and Liquids 10.5 Changes of State.

Pre-AP Physics Unit 6: Thermodynamics. “Thermodynamics”  Is derived from Greek meaning “movement of heat.”

Integrated Physics and Chemistry

A. A graph of the temperature of the system versus the amount of heat added (or temp vs time if the heat is added at a constant rate) is called a ______.

Calorimetry How to use math to describe the movement of heat energy Temperature Change Problems Temperature Change Problems Phase Change Problems Phase.

Chapter 12 Changes in Temperature and Phases. Goals Perform calculations with specific heat capacity. Interpret the various sections of a heating curve.

Conservation of Energy

Warm up: write this question and answer in your spiral As a substance such as water is cooled down, the atoms and molecules undergo a– a. physical change.

Test #3 Phase Changes. How much heat energy does it take to warm, melt, or boil a substance? ~~ Calorimetry ~~ q = m c  T q = m H f q = m H v q = heat.

Regents Chemistry   Anything that has mass and takes up space  3 states/phases of matter  Solid  Liquid  Gas Lesson 1:What is matter?

Heating & Cooling Curves Heat vs. Temperature graphs.

Aim: How to measure the amount of heat released during a phase change

Aim: How is energy related to a phase change? Do Now: 1.Take out your calculator and reference tables. 2.What is the difference between temperature and.

What happens to molecules as the temperature increases? Kinetic Energy Increases, they move faster What are on the axis of a phase change diagram? Temperature.

Kinetic and Potential Energy on the Nanoscale. Kinetic Energy on the Nanoscale thermal energy Baseball Looking at a tiny piece within the baseball.

Matter, Energy & Temperature. States of Matter: Matter occurs in __ states: 3 Solids have a definite _____ and _______. shape volume Liquids have a.

Calorie (energy) Calculations A calorie is defined as the amount of energy it takes to raise the temperature of one gram of water by one degree Celsius.

Phase Change Problems.

6.4 States of Matter & Changes of State The three states of matter are: solid, liquid, gas. A change of state requires a change in the thermal energy of.

Heating and Cooling Curves

Changes of State also known as Phase Changes. What are phase changes? Phase changes (changes of state) are the processes of changing from one state of.

Topic: Heating Curves for pure substance Do Now: What is the difference between a mixture and a pure substance?

Lesson 7: Just A Phase Key Terms. Solid A solid has definite volume and definite shape. The particles in a solid are closely packed and vibrate in relation.

Chapters 13 & 17 Phases and Heat. Phases There are three phases, or states, that we will discuss  Solid  Liquid  Gas.

Warm up What information does the chemical formula below tell you. What information does the chemical formula below tell you. CaSO 4 (aq)

Energy Changes & Phase Changes Heating & Cooling Curves.

Heating and Cooling Curves continued Harry S Truman Chemistry Dept.

Heating and Cooling Curves The heating curve is a graph which represents how a sample changes phases. As heat is added over time, the sample changes temperature.

Heating Curves and Energy. Which of the following measures the average kinetic energy of a sample? 1.Mass 2.Volume 3.Specific heat 4.Temperature 5.Heat.

Specific Heat Capacity. Imagine… A hot day in Arizona…in your back yard is a metal barbeque and a glass of water. Would you want to stick your hand in.

ENERGY. Energy Ability to do work Kinetic Energy Energy of motion Potential Energy Stored energy Temperature Measure of the Average Kinetic Energy of.

Aim: How to measure energy absorbed during a phase change DO NOW: 1. A g piece of iron absorbs joules of heat energy, and its temperature.

REVIEW 1.Write a formula for the freezing of water. 2.Write a formula for the boiling of water. 3.Write a formula for the condensing of water. 4.Write.

Water is a substance that is found on earth and in the atmosphere in all three phases of matter.

Measurement of Heat Energy. The amount of heat given off or absorbed in a reaction can be calculated by a) q=mc∆T(Table T) q= heat (in joules or calories)

Unit: ENERGY Topic 1: Types of Energy Energy = The ability to do work or produce heat Unit of energy = the Joule = J Two types: Potential Kinetic Lord.

Honors Chemistry Podcast 2.3 Joule Problems Q = mc  T.

Unit 4 Thermodynamics. HEATING AND COOLING CURVES.

Heating Curve Turk.

HEATING AND COOLING CURVES

Liquids and Solids.

Heating/Cooling Curve & Energy Calculations

Warm-up: Draw a Line Graph using the following data: Average Temperatures.

Heating and Cooling Curves

HEATING CURVES.

Phases of Matter, Energy and Phase Changes

Heating and Cooling Curves

Heating Curves Phase changes & Energy.

Phase Changes Notes.

Presentation transcript:

HEATING AND COOLING CURVES

What are some things that happen as we heat a sample up? Solid  Liquid  Gas Melting, Evaporating

What is heat? How is heat different from temperature? Heat is a measure of kinetic energy IIn chemistry heat is measure in Joules (J) HHeat is dependent on mass, temperature change and specific heat (or ability of a substance to absorb heat) Temperature is a measure of warmth or coldness. TTemperature is independent of heat TTemperature is measured in Kelvin (K) or Celsius (C)

What is the heating curve? The heating curve is a graph which represents how a sample changes phases. As heat is added over time, the sample changes temperature and phase accordingly. Thus heating curve.

How does the heating curve look?

What are the parts of the heating curve?

Why is the curve flat at some portions? Temperature is staying constant, but potential energy is decreasing During this time the solid completely becomes liquid (or liquid becomes solid)

Why is the curve flat at some points? This is called the heat of fusion (H f ) in segment BC and heat of vaporization (H v ) in segment DE. Remember fusion is melting and vaporization is evaporation

What is heat of fusion? What is heat of vaporization? H f is the amount of energy needed to completely make a solid into a liquid H v is the amount of energy needed to completely make a liquid into a gas

Summary The heating curve is a useful tool to show us the changes in temperature and energy as a sample is heated up. It give us detailed information about phases and phase changes of samples.