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What are some examples of physical changes for a tarnished penny?
Wiki User
∙ 11y ago
Scratching it
Wiki User
∙ 11y ago
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What is a tarnished penny?
A tarnished penny is a penny that has been discolored or dulled due to oxidation of the metal surface, usually resulting in a dark or dirty appearance. Tarnishing can occur over time when the penny is exposed to air and moisture.
Why penny flattened by a hammer is a physical change?
It is a physical change, because it does not change in substance. A penny, whether in its normal state or flattened, is still a penny. Similarly, if you drop a watermelon and it breaks apart, that is also considered to be a physical change because it is still a watermelon. Things are considered to be chemical changes when the substance changes into something new, and is commonly classified as irreversible. When an object rusts, it is considered to be a chemical change. Chemical changes are associated with a temperature change, or a color change or bubbling or something of the sort. Physical changes deal with physical changes in state, for example, ice melting, or in the example you provided, a penny being flattened.
What makes a penny tarnished?
The copper in the pennies reacts with the air and forms copper oxide, which is greenish in color. It is a slow process and can be reversed by cleaning the penny with an acidic solution.
Is a gold penny chemical or physical?
It's chemical because you have to heat a liquid until it's super hot then you put the penny's in a cooler liquid and then it changes color.
Is tarnishing a physical property or a chemical property?
chemical, because when a penny is tarnished its a chemical change because, its weathered down its destroyed. The tarnish itself is usually either the oxide and/or sulfide of the underlying metal.
How does a soft drink clean a penny?
The acid in the drink gets into the tarnished or the dirt particles and will clean it but you might have to leave it in for a few days.
How is physical change and chemical change different?
A physical change is when some thing's shape or volume is changed. But a chemical change is a reaction between two or more objects to create something new and you can't get back what you originally started with.
What kind of soda changes the color of a penny?
Coke or sprite will change the color of a penny.
What will a penny do in vinegar after 30 minutes?
If you have any tarnished pennies in your penny jar, you can easily clean them in vinegar. If you leave your pennies in white vinegar and salt for about 30 minutes and they will come out shiny and pretty clean. Be sure to rinse the vinegar off.
Will coke melt a penny or nail?
Coke will not melt a penny or a nail; that process would involve heat. Instead, the acid from the soda may oxidize some of the metal atoms in the penny and the nail, causing them to become ions and soluble. The some of the metal will dissolve, causing the penny or nail to become pitted and tarnished. However, these objects will not melt.
Is putting a penny in lemon juice a physical or chemical change?
physical reaction
Canada bicentenial penny value?
Five cents in uncirculated condition. If the coin is worn/tarnished/shows signs of being in circulation, it may only be worth its face value.
