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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. ... When you open the bottle the excess gas rushes out of the bottle and a hissing sound is heard. ... work at the Coca-Cola plant pump carbon dioxide into the Coke to carbonate it ... In nature, when we "bail" at the speed where the water level remains...

If Something Fizzes Does It Mean That It Is Giving Off a Gas? | The ...


The molecules of that gas may or may not have been present in a substance before the ... The fizzing of soda is a physical change that involves the release of gaseous ... A bottle of soda doesn't fizz when it is closed because the pressure is higher, ... This happens because carbon dioxide is created in the chemical reaction ....

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 ... water). When the can is opened without shaking ... Coca- Cola Classic, Caffeine ... bottles during heating, the heated bottles ... K changes with.

Physical or chemical? Teacher's guide


In this activity, students will experience physical and chemical changes. ... Warm water ... bubbles, the formation of a new substance or the emission of a gas. ... When you open the bottle, that pressure is released, and so is the carbon dioxide .

Module 4 Chemistry Review Notes - Engrade Wikis


For iron sulfide, two elements (sulfur and iron) are heated together so that ... Why is Coca Cola a homogeneous mixture? ... tomato If you cut a tomato open, you can see that there is a skin on the ... Classify the following change as physical or chemical: .... This is why a substance changes from solid to liquid to gas as the ...

Food Science: Why Carbonated Soda Explodes When Shaken | The ...


Jul 14, 2009 ... Carbonated drinks are made by forcing carbon gas into a beverage under ... If you or your innocent friend open the bottle at this point, the large ...

Chemical versus Physical Changes - GE.com


heat release, or burning are often indicators that chemical changes are ... interesting of these is the change in state, like the changes from solid to liquid to gas and ... Add the ice to the Erlenmeyer flask or glass bottle and place balloon on top ...

Chemical Activities. Teacher - Eric


reactions, chemical energy and rates of reaction, chemistry around ... open-toed shoes or sandals in the laboratory. 5. .... How Much Gas Is in a Bottle of Cola? 5. 3. Solution of a Gas: What Happens During a Pressure Change? ... The Heat Is On with Zinc and Copper Sulfate ... Physical and Chemical Properties of Fresh Milk.

Textbook - Utah.gov


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.

Chemistry Club Demos - 10-8-15


Instant Coca-Cola . .... damage from the explosion, or physical injury from being hit with the can. ... shaking it will cause much more rapid color changes, as less oxygen is ... Do not heat the flask with an open flame, as this may cause the mixture to bump ... Fill the bottles with oxygen gas from the cylinder in the dispensary.

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


Jun 14, 2012 ... Instead it is a physical reaction. ... It also means changing some factors may cause a larger or smaller ... While the soda is in the bottle, the gas is kept in solution by the bottle's ... The speed at which the Mentos falls through the soda can affect ... Mentos versus crushed, compare warm versus cold Diet Coke.

Is it a Physical or Chemical change? - TutorVista Blog


Dec 22, 2011 ... If you add vinegar to bicarbonate of soda, the mixture fizzes – a gas is ... One of the above is an example of a chemical change, but which […]

Physical Changes vs Chemical Changes Lab ... • Is it a physical


Is it a physical or chemical change and why? • What else ... Crumpling paper does NOT change the nature of the paper. It puts ... It changes from a liquid into a gas (water vapor). This is .... Heat from the flame melts wax below the wick ... bottle. When you open the bottle you are changing the pressure, allowing the CO. 2.