0
this is my homework just give the answer already!
Wiki User
∙ 10y ago
Add your answer:
Earn +20 pts
Is cleaning a penny with vinegar and salt a physical or chemical change?
It is a chemical reaction and this is the correct way to spell penny!
Is salt and vinegar removing tarnish from a penny a physical change?
Physical change
If copper metal rusts would it be a physical change?
If you use a abrasive to scrape the rust off, then it is a physical change. If you utilize a chemical that combines with the rust leaving the unoxidized penny behind, then it is a chemical change.
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.
Is melting a penny an exothermic change?
Chemical, since it doesn't turn back.
Is cleaning a penny with vinegar and salt a physical or chemical change?
It is a chemical reaction and this is the correct way to spell penny!
Is a blackened penny a physical or chemical change?
Chemical
Is a copper penny turning dark a chemical change or physical change?
Chemical.
Is salt and vinegar removing tarnish from a penny a physical change?
Physical change
Is putting a penny in lemon juice a physical or chemical change?
physical reaction
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.
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.
If copper metal rusts would it be a physical change?
If you use a abrasive to scrape the rust off, then it is a physical change. If you utilize a chemical that combines with the rust leaving the unoxidized penny behind, then it is a chemical change.
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.
Is dropping a penny into a glass of water a physical change?
Yes
Is turning a penny gold a chemical or physical reaction?
Anything else then dropping it in molten gold is chemical
Is melting a penny an exothermic change?
Chemical, since it doesn't turn back.
