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Page 1: Calorimetry chem 101

AssalamuAlaiku

m

Page 2: Calorimetry chem 101

Name: Syed Ahmed Khizar

Teacher: Sir Asif ImranCourse: TXCH-101Topic:

Presentation

Measurement Of Thermal Changes

Page 3: Calorimetry chem 101

Measurement Of Thermal Changes

Heat“Energy in Transit.”

“E” which trasfers from one body to another due to temperature difference.

Page 4: Calorimetry chem 101

Measurement Of Thermal Changes

Calorimetry

Calorie = Heat = Therm

Page 5: Calorimetry chem 101

Law Of Heat ExchangeAmount Of Heat

ReleasedAmount Of Heat

Absorbed=

Qreleased =

Qabsorbed

Q = mc△T

Q = nc△T

Q = c△T

Specific Heat

Molar Heat Capacity

Molar Heat Capacity

Heat Released or Absorbed By A Body:

Page 6: Calorimetry chem 101

Problem

For every process:

Every substance have d/f value of “c”.

Impossible for unknown substance.

ChemicalOr

Physical

Heat changes occur

Page 7: Calorimetry chem 101

Easy Solution

Do the process in water.

Why?Process Water

Qprocess = Qwater

But still

error

Another Problem

Environment

Page 8: Calorimetry chem 101

Solution

Open System M E

Close System M E

Isolated System M E

System

Page 9: Calorimetry chem 101

Calorimeter

Not a measuring instrument.Used to keep heat inside.

Page 10: Calorimetry chem 101

Container also absorb heat.

Another Problem

Qprocess = Qwater +

Qcontainer

Page 11: Calorimetry chem 101

Qprocess = Qwater +

Qcontainer

Qprocess = mwcw△T +

mccc△T

How to take reading?

1)Mc

2)Mw

3)Ti

4)Tf

Qprocess = mwcw(Tf-Ti) + mccc(Tf-Ti)

ReadingsBalance

Thermometer

Page 12: Calorimetry chem 101
Page 13: Calorimetry chem 101