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Why do we hear a hissing sound when we open a coke bottle?


When the coke is opened, there is suddenly a great pressure differential. ... All of the additional pressure found within the bottle pushes gas out of the bottle until the ... the men and women who work at the Coca-Cola plant pump carbon dioxide into the ... In nature, when we "bail" at the speed where the water level remains...

Diet Coke and Mentos: What is really behind this physical reaction?


show in 1999 by chemistry teacher Lee Marek ... the solution. So when you pop the top, the equilibrium within the bottle or can is broken, and the concentrated carbon dioxide gas ... When the can is opened without shaking high pressure CO . 2 ... Coca-Cola Classic, Caffeine. Free Coca-Cola ... K changes with temperature ...

Mentos Geyser Science Project - The Lab - Steve Spangler Science


Try placing the soda bottle next to the wall of a brick building (after getting permission ... Open the bottle and dip the thermometer down into the soda. ... The warmer the liquid, the less gas can be dissolved in that liquid. ... A true science fair project changes a variable, creates a new experiment, and then compares results.

K-12 Science Activites | California State University, Los Angeles


Indicators are substances used in chemistry to determine whether a solution is acidic or basic. ... An interesting variant on this experiment is to change the color of flowers by ... Add a cup of warm water to a large flask or bottle. ..... a) Gases can be tested for CO2 content by filling a balloon with gas and then using a straw to ...

Chemical Activities. Teacher - U.S. Department of Education


reactions, chemical energy and rates of reaction, chemistry around the house, chemistry .... Carla L. Clemens: Cover design and section opening pages .... How Much Gas Is in a Bottle of Cola? 5. 3. Solution of a Gas: What Happens During a Pressure Change? 8. 4. ... The Heat Is On with Zinc and Copper Sulfate. 119. 43.

8th Grade: Integrated Science - Utah State Office of Education


Open typefaces used: Crimson for the main reading text, Blackout. Midnight for main headlines ... change, heat or light given off, change in odor, gas given off). ... of energy in a physical or chemical change, and relate the kind of energy added to the ..... bottles and caps are solids, the cola ..... the speed at which a chemical.

General Chemistry/Print version - Wikibooks, open books for an ...


Physical chemistry is the study of the physical properties of chemicals, which are .... We know that wood is flammable because it becomes heat, ash, and carbon ... If someone leaves a bottle of ammonia on a desk, and there is a hole in it, ... Changes of color or release of odors (i.e. release of a gas) might be chemical.

Shake your bottle of champagne to STOP it overflowing, says ...


Dec 19, 2014 ... French researchers have shown that shaking a bottle of champagne actually ... As gas requires more space than liquid, this reduces the pressure on the cork. ... bottles of champagne can reduce the speed of the cork as it leaves the bottle. .... unless it has arrived warm and been shaken prior to opening.

The filter so powerful it can turn Coca Cola into water... but would ...


Apr 22, 2013 ... The incredible filter so powerful it turns Coca Cola into water ... This plastic water bottle is fitted with a Nasa-inspired filtration ..... Commandos 'road-test' jihadi hunting quad boat: It's the high speed vessel that's dropped from the air. ... of barbecue: Experts reveal the chemistry behind prepar...

Why does a glass of water left for a while, have tiny bubbles on the ...


Oct 28, 2014 ... These processes would occur with many phase changes in many different substances ... But nucleation of bubbles requires a vapor seed, a gas/liquid interface ... I don't think they tried suddenly opening a bottle while holding it in a proton beam ... This is actually why you can supercool/heat ultra pure water.

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Spurting Science: Erupting Diet Coke with Mentos - Scientific ...


Jun 14, 2012 ... Instead it is a physical reaction. ... While the soda is in the bottle, the gas is kept in solution by the ... The speed at which the Mentos falls through the soda can affect how ... Be sure to wear eye protection when putting the candies into the cola! ... Mentos versus crushed, compare warm versus cold Diet Coke.

Chemical reactions - Deakin University


In any chemical or physical change, the total amount of energy remains constant. •. Chemical ... Combustion is a change of state of matter: solid or liquid to gas. ... A candle burning is endothermic, because heat is needed to initiate the reaction. ..... energies than the water molecules because of their greater speed and mass.

Coke® & Mentos® - Exploring Explosive Chemistry! - Science Buddies


Determine if using crushed Mentos candies will change the height of exploding soda ... Diet Coke® is a registered trademark of The Coca-Cola Company.