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Which reactions shows a physical change?
Burning coal is a chemical reaction, a chemical change; but the solid reactant is transformed in gaseous products (H2O and CO2) - this is a physical change.
What toy shows a physical change?
A toy that shows a physical change is a stretchy rubber ball. When you stretch the ball, it changes shape and size temporarily, but once you release the tension, it returns to its original form. This change is physical because the molecules in the rubber are only rearranging themselves, not undergoing a chemical reaction.
Which of these outcomes is conclusive evidence that mixing sugar in water is a physical change?
The ability to separate the sugar and water through physical means (such as evaporation) would be conclusive evidence that mixing sugar in water is a physical change. This shows that the properties of both the sugar and water have not changed chemically, indicating a physical rather than a chemical change.
Why is melting ice cube an example of a physical change?
Melting ice is a physical change because the change in state from solid to liquid does not alter the chemical composition of the ice - it is still water (H2O) molecule. The molecules in the ice are simply rearranging themselves due to an increase in temperature.
What is the recipe of a compound?
A compound is a substance formed by chemically combining two or more elements in specific ratios. The recipe of a compound is represented by its chemical formula, which shows the types and number of atoms present in a molecule of the compound. Molecules of compounds are formed through chemical reactions that rearrange the atoms of the elements involved to create a new substance with unique properties.
Is this a chemical change or a physical change - when coal oil and natural gas are decomposed in landfills they produce methane gas?
it is chemical property. they use the word decomposition immaterially shows changein chemical composition.hence chemical change.
How can you tell that the burning of a candle causes both physical and chemical change?
By observation: 1. A flame shows that heat is being generated, indicating a chemical change taking place. 2. A physical change would be the solid wax changing to liquid under the flame.
What is meant of '. ' in chemical reaction?
The "." in a chemical reaction represents a phase boundary or a physical state change. It separates reactants from products, indicating a change in state, such as from solid to liquid or gas to aqueous.
Which reactions shows a physical change?
Burning coal is a chemical reaction, a chemical change; but the solid reactant is transformed in gaseous products (H2O and CO2) - this is a physical change.
Is formation of dew and rain a physical change?
Formation of dew and rain is not a chemical change, but a physical change. Often a change involving state of matter like in this case condensation (or like evaporation, melting, freezing, sublimation, or deposition) shows a physical change and not a chemical change.
What toy shows a physical change?
A toy that shows a physical change is a stretchy rubber ball. When you stretch the ball, it changes shape and size temporarily, but once you release the tension, it returns to its original form. This change is physical because the molecules in the rubber are only rearranging themselves, not undergoing a chemical reaction.
Is breaking your arm a physical change?
I have reasons to believe it is a physical change. The appearance is different but the body functions pretty much the same way it would have. Although, there maybe a chemical change as the body adapts to having one hand. Whether the Chemical change occurs in the body or joint where the hand was previously it still doesnt explain why it shows signs of physical change as well.
Which of these outcomes is conclusive evidence that mixing sugar in water is a physical change?
The ability to separate the sugar and water through physical means (such as evaporation) would be conclusive evidence that mixing sugar in water is a physical change. This shows that the properties of both the sugar and water have not changed chemically, indicating a physical rather than a chemical change.
Is luster a typical physical property of metals?
Luster is a physical property of crystals.
Why is melting ice cube an example of a physical change?
Melting ice is a physical change because the change in state from solid to liquid does not alter the chemical composition of the ice - it is still water (H2O) molecule. The molecules in the ice are simply rearranging themselves due to an increase in temperature.
What is the relationship between the change in enthalpy (H), specific heat capacity (Cp), and the change in temperature (T) in a chemical reaction or physical process?
The relationship between the change in enthalpy (H), specific heat capacity (Cp), and the change in temperature (T) in a chemical reaction or physical process is described by the equation H Cp T. This equation shows that the change in enthalpy is directly proportional to the specific heat capacity and the change in temperature.
What is an example of a physical change and a chemical change for iron?
Physical change: bending. Chemical change: Rusting (oxidation). An example of both in one item: A wrought iron fence was heated and bent into a decorative pattern. After 20 years, the fence shows evidence of deep rusting, especially on decorative curves.
