For chemical reactions, the elements in a sealed vessel will not change. But, reactions can take place that would tend to take the sample to a state of equilibrium. Or, with heating or cooling the physical state can be changed.
Another type of reaction is nuclear decay, in which radioactive substances will spontaneously decay to other radioactive substances, or decay to non-radioactive substances, thus actually changing the elements present.
A physical change is a change in the form of matter but not the chemical composition of it.
When matter undergoes a chemical change, the composition of the matter changes. When matter undergoes a physical change, composition of the matter remains the same.
Physical change, as change in state.
A change in state is a physical change because the chemical composition of the substance remains the same.
mass cannot change quanity if it is not added or removed
The compsitions stays the same :0
it is blank lol
it is blank lol
"A phase is a state of a...system that has...uniform chemical composition and physical properties.""Matter." Wikipedia. 19 Feb 2008, 04:16 UTC. Wikimedia Foundation, Inc. 19 Feb 2008 .
Heating sulfur is a physical change. You're not changing the chemical composition of the sulfur, just the temperature. Now if you heat it to its boiling point and and it changes to a vapor it's a chemical change because you've changed its state of matter.(Actually changing the state of matter of an object is still a physical change, as it does not change the chemical composition of the element)
when matter goes through a physical change, that state of the matter changes. so if i took liquid water and froze it into ice... that would be a physical change because it is still the same compound in a different form
freezing water and evaporation is physical-only change in state of matter. rusting nail is chemical-alters composition of substance