States of matter boiling point & freezing point (enhance)
SSI 3013 INFORMATION AND COMMUNICATION TECHNOLOGY IN SCIENCE DATA LOGGING : STATES OF MATTER “ BOILING POINT AND FREEZING POINT” NAME MATRIK NO.ARRAFFIE BIN ASGARI D20101037536NOR AFIFAH BT MD JAMAL D20101037490NOOR HAZLINA BT IBRAHIM D20101037489
States of Matter“Boiling Point and Freezing Point”
Changes in the States of Matter:• Heat is a form of energy which moves the particles in matter• Changes in the states of matter can occur through heating or cooling process. This is when the heat energy is absorbed or released from the matter• The changes in the states of matter which can occur during the changes in heat includes: i. Melting ii. Freezing iii. Boiling iv. Condensation v. Sublimation
• During cooling process, heat will be released from matter and the state of the matter will change from gas to liquid and finally to solid.
PROCEDURE (S) :1. Connect the sensor to an interface box linked to the computer as shown in figure below.2. Place the ice in the beaker and observed the state of ice.3. Place the temperature sensor in the ice.4. Take reading for every 30 seconds of time interval until it is boiled.
6. Place Bunsen burner below the beaker for heating the beaker. Click the start button. Observe any transition process and the temperature they start to change.7. Record the data.8. Plot graph temperature against times.9. Cool the beaker to the room temperature. Record the temperature and time taken for it to cool.10.Record the data.11.Plot a graph of temperature against times.
The graph of temperature against time taken for heating of water
The graph of temperature against time taken for cooling process
DISCUSSION: DISCUSSION• The melting process is a process where the solid phase changed to liquid phase under specific pressure. The evaporation process is a process where the liquid phase is changed to gas or vapors phase.• The substance used is water. The melting point of water is 0 oC and temperature stay the same as the melting process occurred. When water is heated, the particles gain energy and move faster as to move away their positions and begun to vibrate around each other.
• The temperature during boiling process is constant which 100 oC because the boiling point of water is 100 oC. When a liquid is heated, the particles gained energy and tends to moved faster. Some particles in water, which have enough energy to escape into air to from vapor and this process is known as evaporation.
• During solid phase, the water molecules are vibrated around the point and not free to move. It is expand, but, in a small value when heat is supplied. This is due to the strong force between the molecules. The energy in the particles is low.
• During liquid phase, the water molecules moved in random arrangement but still in fairly stick together. The energy in the molecules is moderate.• During gas phase, the water molecules moved in fast and randomly. The energy in the particles in very high.
• During the cooling process, the particles loss of energy and they came closer together. As they collide, they will stick together to form droplets forming a liquid. During this process, energy in particles is loss due to less energy is needed as they are cooling.
A steam turbine is a device thatextracts thermal energyfrom pressurized steam and uses it todo mechanical work ona rotating output shaft. The turbine generates rotary motion, it is particularly suited to A rotor of a modern steam turbine, used be used to drive in a power plantan electrical generator. Steam Turbine