Chemical change vs. physical change?
chemical change is one in which the substance that is being changed becomes a new substance/molecule. physical change is one in which the substance remains the same molecule yet may undergo a phase change. match = sulfur burning = chemical metal warming = the metal doesn't change so physical water condensing = physical because it's still water C deposition = physical because the metal and the C are not forming a separate substance
Physical vs. Chemical changes?
A physical change is a change that occurs to a substance's size, shape or state. Cutting up paper is a physical change because, in theory, you can still rejoin the edges of that paper to make it just as it was before (but I know this is almost impossible without the proper machinery). Adding Kool Aid (cherry for example) to water creates a solution (a homogenous mixture of a solid dispersed in a liquid). You simply have millions of tiny red solid state Kool Aid granules evenly dispersed in water so well that it looks like a chemical reaction took place BUT IT DID NOT. The key is that the ingredients themselves (the water and the Kool Aid) have not been changed, only displaced. By boiling the water completely you would be left with dry Kool Aid but again this is only possible with hi-tech machines found in labs. BUT IT IS POSSIBLE. In contrast, a chemical reaction actually changes the chemical makeup of the substances involved. New molecules are formed and energy is either given off or absorbed in the process. Living and growing (people, animals and plants) is an EXTREMELY complex example of both chemical and physical processses. Being alive you are able to chemically stimulate physical processes. When death occurs these chemical processes stop and chemical decomposition takes place.
Physical property vs. chemical property?
a physical property is something that has to do with the material itself, like color, density, softness, boiling and melting point, and conductivity of electricity. Things that are, well, physical. Chemical properties are things you cannot see, like reactivity with other elements. Ex: Copper Physical Properties- reddish metal, malleable, and ductile Chemical Properties- Copper slowly reacts with atmospheric oxygen forming a layer of brown-black copper oxide
Physical properties VS. Chemical properties?
a chemical property refers to that characteristic of a thing that gets at its reactivity. this means what the "thing" will do in the presence of another "thing". this is the way a thing dissolves into something else, or it's likelihood to ignite into flame when heated in the presence of oxygen. a physical property is the characteristic of a thing that's measured without regard to reacting with anything else. this would be the weight, color, liquid/solid/gas nature of a thing, its melting temperature ... all that sort of stuff.
Physical properties VS. Chemical properties?
_ water freezing at 0 degrees Celsius under standard atmospheric conditions _ the smell of a ripe strawberry _ sugar changing into carbon and carbon dioxide when heated _ sugar dissolving in warm water _ cherries having a red color when ripe _ acid rain corroding a limestone statue by changin the limestone into carbon dioxide and calcium chloride which ones are physical and which are chemical properties?
Chemical property vs. Physical property?? HELP!!!?
A physical property is a property that doesn't change the substance whereas a chemical property is a property that describes what happens in a chemical reaction. * Chemical properties are properties of an element or compound in chemical reactions. For example, the fact that sodium reacts with water is a chemical property. * Physical properties are properties of an element or compound that can be observed without a chemical reaction of the substance. A substance's color and density are physical properties.
Chemistry: Physical vs. Chemical Properties?
1) solubility- chemical 2) supports combustion- chemical 3)bitter taste- I don't know 4) melting point-physical 5) reacts with water to form a gas-chemical 6) reacts with a base to form water-chemical 7) hardness-physical 8) boiling point (physical change??) yup 9) luster ( chemical??)-yup
How does a chemical change differ from physical change?
Hey there Mariposa,A physical change in a substance doesn't change what the substance is.A chemical change where there is a chemical reaction, a new substance is formed and energy is either given off or absorbed.Physical vs. Chemical ChangesPhysical Vs. Chemical Changes - ExplainedI hope this helps you
Chemistry help, Physical change vs Chemical change?
a. The only example I can think of here is kind of weak; if you dissolve anhydrous copper sulfate in water, it turns blue. Evaporate the water completely, and you'll get the anhydrous copper sulfate back, and it won't be nearly as blue as the solution was. b & c. Sublimation or evaporation -- these both result in an apparent disappearance of a substance, but if the system is closed, the mass will not change as the sample changes to a gas.