Expansion Worksheet Explains Thermal Expansion

1. Expansion Worksheet Name: Khayyinah varadiba Absent : 17 What do you things about EXPANSION? When a solid, liquid, and gas heated the particle begin to move future a part making the materials bigger is called Expansion. Commonly a matter whether solid, liquid, and gas can expand if they are heated (the temperature is heated). The classification of expansion. 1. a. Length expansion Coefficient is symbolized by (alpha) its unit per degrees Celsius (/ 0 C or C-1) or per Kelvin (/K or K-1) the length expansion coefficient is formulated as follow. Or In which: So the length expansion of solid depends on three factors, those are: 1. The initial length before heated. 2. The temperature increases. 3. The kinds of materials. Several values of the length expansion coefficient of several kinds of matters. The length expansion coefficient of various solids. The kinds of matters Length expansion coefficient Aluminum 2.4 x 10-5 Brass 1.9 x 10-5 Bronze 1.9 x 10-5 Steel 1.1 x 10-5 Iron 1.2 x 10-5 Cooper 1.7 x 10-5 Usual glass 0.9 x 10-5 Pyrex glass 0.32 x 10-5 Gold 1.4 x 10-5 1. b. Area expansion

2. Area expansion can be investigated in solid which is flat or thin disk- shaped. For example glass window. Which into the window glass is not broken? …………………………………………………………………………………………………………………………………………………………… Area expansion coefficient is symbolized by and is defined as the ratio between area increases to the initial area of the body per unit temperature increase. It can be formulated as follows: Or In which: 1. c. Volume expansion. A solid undergoes volume expansion. Its means these solid expansions causing the solid become larger than length and height. Volume expansion coefficient is symbol by it’s defined as ratio of volume increase to the initial volume of body per unit of temperature increase. It’s express as follows: Or In which: 1. d. Gas expansion Gas is matters that can expand will this temperature increase. Similar are expansion of liquid, gas only volume expansion. Based on the research of Gay-Lussac is obtained the volume expansion coefficients of every gas equal, that’s: . In the gas expansion there are three things interconnected, those are: volume, temperature, and pressure. Gas expansion can happen in two condition, those are gas expansion at constant pressure and gas expansion at constant volume. 1. Gas expansion at constant pressure. From example in a close a jar the initial volume of gas = then the gas heated constant pressure. So, the temperature increases of and volume increase of . The formulated as follows: 1. Gas expansion at constant volume. Example a close a jar contains gas then heated, so the temperature increases of. Volume of the air limited, so the air cannot expand and air pressure increases of the formulated as follow: 1. e. Expansion principle in daily life. Application the principle of expansion principle of matter which beneficial in daily life as

3. follows: EXERCISE 1. Write down the solid expansion and give the example of the body! ………………………………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………….. ………………………………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………….. ………………………………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………….. 2. Explain why the mirror glasses with their flame are made a little gap? ………………………………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………….. ………………………………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………….. 3. To control temperature in an electric iron is use a bimetal plates which are made from iron and brass. What happened the bimetal plates if the iron started to be heated? ………………………………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………….. ………………………………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………….. ………………………………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………….. 4. aluminum plates has length 40 cm and width of 20 cm. if that’s plates is heated from initial temperature 25C becomes 45C. conclusion the areas increase of the plats if the expansion of coefficient aluminum is 2.4 x 10C ………………………………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………….. ………………………………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………….. ………………………………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………………………………………………

4. ……………………………………………………………………………………………………………………………….. ………………………………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………….. ………………………………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………….. ………………………………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………….. 5. a pan contains 4 liters water. And then the water in the pan is heated from temperature of 45 C until 90 C. what’s the volume of water at temperature of 90 C, if the water coefficient is 0.0005/ C ………………………………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………….. ………………………………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………….. ………………………………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………….. ………………………………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………….. ………………………………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………….. ………………………………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………….. ………………………………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………….. ………………………………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………….. Gresik, 7th November 2008 Signature Signature (……………………..) Parents Science Teacher

Expansion Worksheet Explains Thermal Expansion

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