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Dıfference and relationship between heat and temperature

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REMZİYE ÇELEBİ

on 6 May 2015

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Transcript of Dıfference and relationship between heat and temperature

THE DIFFERENCE AND RELATIONSHIP BETWEEN HEAT AND TEMPERATURE
HEAT
Heat is energy that is transferred from one body to another as the result of a difference in temperature.And it's symbol is Q.The unit of heat is Joule.Heat has the ability to do work.
TEMPERATURE
Temperature is a measure of hotness or coldness expressed in terms of any of several arbitrary scales like Celsius and Fahrenheit.Its symbol is T.
AN EXPERIMENT
RELATIONSHIP BETWEEN HEAT AND TEMPERATURE
Drill into the details
Scientists use the word "thermal" to mean "heat". Heat energy and thermal energy both mean the same thing.The substance can change state (or phase). For example, if the substance is ice, it can melt into water. Perhaps surprisingly, this change does not cause a rise in temperature. At the exact moment before melting, the average kinetic energy of the ice molecules is the same as the average kinetic energy of the water molecules at the exact moment after melting. That is, the melting ice and the just melted water are at the same temperature. Although heat (energy) is absorbed by this change of state, the absorbed energy is not used to change the average kinetic energy of the molecules, and thus proportionally change the temperature. The energy is used to change the bonding between the molecules. Changing the manner in which the molecules bond to one another can require an absorption of energy (heat) as in the case of melting, or require a release of energy (heat) as in the case of freezing. So, when heat comes into a substance, energy comes into a substance.

BY:Remziye Çelebi
THE DIFFERENCE BETWEEN HEAT AND TEMPERATURE
Simply put, heat is a measurement of energy. All molecules contain some amount of kinetic energy, that is to say, they have some intrinsic motion. The hotter an object is, the faster the motion of the molecules inside it. Thus, the heat of an object is the total energy of all the molecular motion inside that object. Temperature, on the other hand, is a measure of the average heat or thermal energy of the molecules in a substance. When we say an object has a temperature of 100 degrees C, for example, we do not mean that every single molecule has that exact thermal energy. In any substance, molecules are moving with a range of energies, and interacting with each other as well, which changes their energies. But if we average the thermal energies of all the molecules together, we can obtain an object's temperature...
Imagine that you have a bucket full of water and a cup full of water both at 25 °C. If you add the same amount of heat energy (for example 50,000J) to both you would find that the temperature of the cup of water increases by
much more than the temperature of the bucket of water.Temperature is a measure of the kinetic energy of the particles(the faster they are going, the hotter they are).
Temperature does not depend on the mass of the substance The amount of heat energy that a substance has does depend on its mass. If you double the mass, you must double the heat energy to heat it to the same temperature.The amount of heat energy that a substance has also depends on its specific heat capacity.



WHAT IS SPECIFIC HEAT CAPACITY?
The specific heat capacity is the amount of heat energy needed to raise 1 kg of a substance by 1 °C.
Heat transferred = specific heat capacity x mass x change in temperature.
E = c x m x

Where E is the Energy (heat) transferred in J
c is the specific heat capacity in J / kg °C m is the mass in kgθ
is the change in temperature in °C .
This means that the same mass of different substances will contain different amounts of heat energy even though they are at the same temperature


When heating a substance, we must add a certain amount of heat to raise the temperature a specified amount. This capacity to take in heat is unique to each substance and is defined with the symbol C.
•If we add a Joule of energy to one gram of liquid water at
20oC it will raise the temperature to about 20.2oC.
• If we add 1 Joule of energy to one gram of liquid mercury at
20oC it will raise the temperature to about 27oC.
• If we add 1 Joule of energy to one gram of air at
20oC it will raise the temperature to about 21oC.
• This capacity for absorbing heat is called the
heat capacity or the specific heat.



DENEY:1
Deney/Etkinlik Dersi:
Fen ve Teknoloji
Deney/Etkinlik Konusu:
• Maddenin Degişimi ve Tanınması
• Isı - Sıcaklık
Deney/Etkinlik Malzemeleri:
• İspirto Ocagı
• Sacayagı
• Termometre
• Beherglas
• Su
• Kibrit
Deneyin/Etkinligin Yapılışı:
Beherglaslardan birine 100 mL, digerine 200 mL su koyun. Suların ilk sıcaklıklarını ölçün. Sonucu tabloya kaydedin. Ispirto ocaklarını sacayaklarının altına koyun ve yakın. Her iki beherglası aynı anda ısıtmaya başlayın. Bir yandan da dakikada bir kez termometreler ile sıcaklıkları kontrol edin.Aşagıdaki grafige 1, 2, 3, 4 ve 5. dakikanın sonunda suların sıcaklıklarını kaydedin. Sıcaklık degişimlerini karıştırmamak için tablodaki işaretlemeyi farklı renkte iki kalem kullanarak yapabilirsiniz. Sıvıların sıcaklık artışlarını karşılaştırın.

Deney/Etkinlik Sonucu:
Aynı cins maddelerin farklı miktarlarına eşit ısı verildiğinde, kütlesi fazla olanın sıcaklık artışı daha az olur. Sıcaklık artışı kütle ile ters orantılıdır.

DENEY:2
EŞIT KÜTLELI FARKLI MADDELERIN ISI SICAKLIK FARKI

Deneyin Amacı:
Eşit kütleli farklı maddelerin özdeş ısı kaynaklarıyla eşit sürede ısıtıldıGında maddelerdeki ısı ve sıcaklık farklarını görmek

Kullanılan Araç ve Gereçler:

1-2 adet beherglas (250ml?lik)
4-2 adet amyantsız tel örgü
7-hidrostatik terazi ve tartı takımı
2-2 adet termometre
5-2 adet ispirto ocağı
3- su ve sıvı yağ
6-2 adet sacayak

Deneyin Yapılışı:
1-Beherglasları boş olarak tartın not edin.
2-Beherglasların içine 100 er gr su ve sıvı yaG koyarak tartın.
3-Termometreyle sıcaklıklarını ölçün ve not edin.
4-İspirto ocaklarını aynı anda yakarak beherglas içindeki su ve sıvıyagı eşit süreyle (5dk) ısıtın.
5-Termometreleri beherglas içine batırarak sıcaklıklarını ölçüp tekrar not edin.
6-Termometreleri çıkartıp 5 dk daha sıvıları ısıtalım.ispirto ocaklarını kapatıp ve termometreyle sıcaklıgı tekrar not edin Sıvılar arasında termometrede okudugunuz fark gözlediniz mi neden?

Deney Sonucu:
Beherglaslar içindeki su ve sıvı yağa eşit miktarda ısıtıldıgı halde (eşit ısı verildi) sıvıların sıcaklık artışları eşit degildir.
Teorik Bilgi:
Farklı maddelere eşit miktarda ısı verilse de sıcaklık artışları eşit olmaz yani sıcaklık degişimi maddenin cinsine (özısına) baglıdır.
Özısı:Bir gram maddenin sıcaklıgını 1 0 C arttırmak için gerekli ısı miktarına özısı denir. Özısı maddeler için ayırtedici bir özelliktir.
Özısı su için:4,2 joule , buz için :2,1 joule, bakır için:0.38 joule dur.







references
http://zonalandeducation.com/mstm/physics/mechanics/energy/heatAndTemperature/heatAndTemperature.html
http://www.bbc.co.uk/bitesize/ks3/science/energy_electricity_forces/energy_transfer_storage/revision/4/
http://science.howstuffworks.com/dictionary/physics-terms/heat-info3.htm
http://www.theweatherprediction.com/habyhints/39/
http://www.physicsclassroom.com/class/thermalP/Lesson-1/What-is-Heathttp
://hop.concord.org/h1/phys/h1p.htmlhttp://www.diffen.com/difference/Heat_vs_Temperaturehttp


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