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Central Colleges of the Philippines

College of Arts and Sciences- Education

Mathematics and Natural Sciences Department

Experiment No. 5

Changes of Matter and Energy Transformation

SALVACION, KERVIN T.BSME-1

GROUP NO. 3

DATE PERFORMED: September 10, 2012

DATE OF SUBMISSION: October 16, 2012

Prof. Malou Medina

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II. Purpose/ Objective

1. To differentiate physical change from chemical change.

2. To know that energy is involved in chemical change.

3. To identify the different types of chemical transformation.

III. MaterialsBunsen Burner, 50-ml beaker, crucible tong, evaporating dish, 10-ml graduated cylinder, match,

platform balance, spatula, test tubes, test tube brush, test tube rack, tripod and wire gauze.

IV. Chemicals Used

Iodine crystals, zinc strips (Zn), hydrochloric acid solution (HCI) and ethyl alcohol, staple wire,copper sulfate solution (CuSO4)

V. ProcedureA. Physical and Chemical Changes

1. Place 0.5 g of iodine crystals in an evaporating dish and heat over a small sized non-luminous flame.

When most of the iodine crystals had vaporized put off the flame and allow cooling for severalminutes.

2. Put zinc strip at the tip of crucible tong and ignite it with non-luminous flame.

B. Energy Transformation

1. Measure 10-ml of alcohol and pour it into a 50-ml beaker. Add 1 g of iodine crystals and stir the

resulting solution. Feel the bottom portion of the beaker.

2. Pour 5-ml of water into a test tube and add 0.5 g of calcium hydroxide. Mix thoroughly the calciumhydroxide solution. Feel the bottom part of the test tube.

C. Types of Chemical Reaction1. Synthesis or Combination

Hold the magnesium ribbon by means of crucible tong and ignite in non-luminous flame.

2. Decomposition

Heat strongly 0.5 g of potassium chlorate strongly in a test tube. Thrust a glowing splinter into the

test tube.

3. Displacement or Substitution

Add 5 pieces of staple wire to 5-ml of copper sulfate solution, which is contained in a test tube.

Allow it to stand and observe.

4. Metathesis or Double Substitution

Mix 5- ml of HCI solution and 5-ml of copper sulfate solution and observe.

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VI. Data and Observation

A. Physical and Chemical Changes

1. Iodine Crystals

What substance was formed after cooling? No substance formedWhat type of change took place? Physical Change

What is physical change? A change in phyisal properties of matter like in size and color.

2. What substance was formed after ignition? Magnesium Oxide (MgO)

What type of change took place? Chemical Change

What is chemical change? A change that involves in chemical composition of matter

B. Energy Transformation

1. Iodine Crystals + AlcoholDescribe the temparature at the bottom portion of the beaker. The temparature is cold.

The temparature is decreased at the bottom.

2. Calcium Hydroxide + WaterObservation:

C. Chemical Reactions1. What product is formed after lighting Mg? (MgO) Magnesium Oxide

Equation Involved: Mg + O

2. What gas is liberated after heating KCLO

What happened to the glowing splinter? It is continously ignited or stayed alight.

What equation involved: 2KCLO 2KCL + 3O

3. Describe the reaction between staple wire and CuSO Solution.

The staple wire turned dark blue

What are the products formed? SnSO + CuEquations involved: __HCI + CuSO

4. Describe the result after mixing HCI and CuSO Solutions.The solution turned from dark blue to light blue.

Equation Involved: HCI + CuSO

VIII. Conclusions:

I therefore conclude that a substance may undergo in either a physical or chemical changedepending on the process have done. An object is said to be in a physical change when the object has

only change in its physical properties like in size and color. While an object is said to be in physical

change when it involves a change in chemical composition of matter. I also learned the Energytransformation of matter and the types of chemical reaction.

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Central Colleges of the Philippines

College of Arts and Sciences- Education

Mathematics and Natural Sciences Department

Experiment No. 6

Changes of Matter and Energy Transformation

SALVACION, KERVIN T.

BSME-1

GROUP NO. 3

DATE PERFORMED: September 19, 2012

DATE OF SUBMISSION: October 16, 2012

Prof. Malou Medina

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VI. Data and Results:

A. Boyle's Law

DATA CASE 1 CASE 2 CASE 31 Volume of entrapped air in graduated

cylinder, ml (V )

2 Distance between the water levels inside and

outside the graduated cylinder, mm (h)

3 Atmospheric or Barometric Pressure, mm (P)

4 Vapor Pressure of water, mm (a)

5 Corrected gas pressure due to entrapped air

mm (Pg)

6 Room temparature, C

7 Absolute Temparature, K

8 Volume of entrapped air at STP condition, ml

(Vo)

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VI. Data and Results:

A. Boyle's Law

DATA CASE 1 CASE 2 CASE 31 Volume of entrapped air in graduated

cylinder, ml (V )

2 Distance between the water levels inside and

outside the graduated cylinder, mm (h)

3 Atmospheric or Barometric Pressure, mm (P)

4 Vapor Pressure of water, mm (a)

5 Corrected gas pressure due to entrapped air

mm (Pg)

6 Room temparature, C

7 Absolute Temparature, K

8 Volume of entrapped air at STP condition, ml

(Vo)

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VI. Data and Results:

A. Boyle's Law

DATA CASE 1 CASE 2 CASE 31 Volume of entrapped air in graduated

cylinder, ml (V )

2 Distance between the water levels inside and

outside the graduated cylinder, mm (h)

3 Atmospheric or Barometric Pressure, mm (P)

4 Vapor Pressure of water, mm (a)

5 Corrected gas pressure due to entrapped air

mm (Pg)

6 Room temparature, C

7 Absolute Temparature, K

8 Volume of entrapped air at STP condition, ml

(Vo)