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What is always involved when physical or chemical changes occur in matter?
When physical changes occur in matter, the substance's state or appearance changes without altering its chemical composition. In contrast, chemical changes involve a modification in the substance's chemical composition, resulting in the formation of new substances.
Is melting iron into liquid a chemical change?
Yes, melting iron into a liquid state is a physical change, not a chemical change. This process involves applying heat to change the state of the iron from solid to liquid, without altering its chemical composition.
Are changes in properties always evidence of a chemical change and why?
No. Boiling water is a physical not a chemical change, and yet clearly steam has very different properties than liquid water does. A chemical change is one which will change the composition or identity of the material. So not only will its properties change, but it's chemical composition will also be changed
What is the total of chemical and physical reactions?
Chemical reactions involve a change in chemical composition, while physical reactions involve a change in state or appearance without changing the chemical composition. Together, they encompass the various transformations that can occur in matter.
Is a puddle of dirt a chemical change?
No, a puddle of dirt is not a chemical change; it is primarily a physical change. When dirt becomes wet, its physical state changes as it absorbs water, but the chemical composition of the dirt remains the same. Chemical changes involve the formation of new substances, which does not occur in this scenario.
What is needed for a solid to sublime and what changes of state occur?
pressure and the change of state is chemical
Do chemical change and physical change always occur sepretly?
Any physical changes that change during a chemical reaction are the consequence of the products physical properties. The melting point may be much lower than the reactants and change state but ultimately it was the properties responsible for this and not the chemical reaction itself. If anything there are situations where the two both occur somewhat simultaneously as well as situations where chemical change doesn't proceed with a physical change and vice versa.
In chemistry the state in which a chemical process and the reverse chemical process occur at the same rate such that the concentrations of reactants and products do not change is called what?
Chemical equilibrium is the state in which the forward and reverse reactions occur at the same rate, resulting in no net change in the concentrations of reactants and products.
What is always a characteristic of a chemical change but not always a characteristic of a physical change?
When a chemical change takes place, the chemical structure of particles involved changes (i.e. one or more new substances are formed). In a physical change, the physical state of the particles involved changes (e.g. a solid melts and becomes a liquid). The chemical structure of the particles does not change, and no new substance is formed.
What is always involved when physical or chemical changes occur in matter?
When physical changes occur in matter, the substance's state or appearance changes without altering its chemical composition. In contrast, chemical changes involve a modification in the substance's chemical composition, resulting in the formation of new substances.
Is melting iron into liquid a chemical change?
Yes, melting iron into a liquid state is a physical change, not a chemical change. This process involves applying heat to change the state of the iron from solid to liquid, without altering its chemical composition.
Are changes in properties always evidence of a chemical change and why?
No. Boiling water is a physical not a chemical change, and yet clearly steam has very different properties than liquid water does. A chemical change is one which will change the composition or identity of the material. So not only will its properties change, but it's chemical composition will also be changed
What is the total of chemical and physical reactions?
Chemical reactions involve a change in chemical composition, while physical reactions involve a change in state or appearance without changing the chemical composition. Together, they encompass the various transformations that can occur in matter.
Is a puddle of dirt a chemical change?
No, a puddle of dirt is not a chemical change; it is primarily a physical change. When dirt becomes wet, its physical state changes as it absorbs water, but the chemical composition of the dirt remains the same. Chemical changes involve the formation of new substances, which does not occur in this scenario.
Is change of state a chemical change?
No, change of state is a physical change.
Can chemical change and physical change happen simultaneously?
No, chemical changes and physical changes are distinct processes that occur separately in a system. Chemical changes involve the formation of new substances with different chemical properties, while physical changes involve alterations in the state or appearance of a substance without changing its chemical composition. These processes do not typically occur simultaneously.
What states that the mass of the product of chemical change is always the same as the mass of what you had when you started?
invisible state :p
