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How do you classify the difference between a physical and chemical change?
Physical changes occur when objects or substances undergo a change that does not change their chemical composition. A physical change involves a change in physical properties. Examples of physical properties include melting, transition to a gas, change of strength, change of durability, changes to crystal form, textural change, shape, size, color, volume and density.
Which technology gained sudden and widespread popularity during the 1950s?
Television
What happens when sublimation takes place?
Sublimation is the change of state of matter from solid directly to gas. Dry ice does this. Deposition is the change of state from gas to solid. This is how frost forms. There are likely more examples of each, but they both skip over the liquid state of matter.
Do chemical bonds share atoms?
No. However, covalent bonds share electrons between two atoms. In an ionic bond, electrons are either gained or lost forming ions.
What happens to the temperature when a substance is melting?
For most substances, it's the same temperature. For example, ice melts at 0°C (273K), and water freezes also at 0°C. A few substances, such as agar, have a hysteresis. For example, agar melts at 85°C; to solidify it again, you have to cool it down to about 32-40°C.
What is a chemical change in which electrons are gained?
A chemical change in which electrons are gained is a reduction.
What fact does Antoine lavoisier's work show?
Mass is Neither lost nor gained during a chemical change.
What happens when a substance change states?
When a substance changes state, Energy within the substance is gained or lost, but the composition is unchanged.
What is it called when energy is gained by something during a change of state?
The process of gaining energy during a change of state is known as endothermic phase transition. This occurs when energy is absorbed by a substance, causing it to transition from one state to another, such as from solid to liquid or liquid to gas.
Is energy stored in the chemical bonds of the molecules in the plant?
Chemical energy is a bit more complicated than that. If a substance "has chemical energy", that means that energy can be gained by rearranging that substance with other atoms or molecules - often the oxygen (O2) form the air. Thus, the energy is neither truly stored in the substance you are considering, nor in the oxygen - but in their relationship.
What is gained in a chemical reaction?
Electrons are the ones gained or lost in a chemical reaction. Electrons are gained in oxidation and lost through the chemical reaction known as reduction.
What is calorimetery?
Type your answer here... The heat gained or loss during a physical or chemical reaction is called calorimetery.
Is Sublime of a solid to gas chemical or physical change?
Change of state is always physical. You have not lost or gained any atoms. Therefore its physical.
The idea that atoms are gained nor lost during a chemical reaction is called the law of?
The idea that atoms are neither gained nor lost during a chemical reaction is called the law of conservation of mass. This principle states that the total mass of the reactants must equal the total mass of the products in a chemical reaction.
Why do reactions have to he balanced?
atoms are not lost or gained in a chemical reaction
What is the degree of reduction for the chemical reaction taking place in this experiment?
The degree of reduction for a chemical reaction is the number of electrons gained by the atoms of a substance. It indicates how much the atoms have been reduced in terms of their oxidation state.
The amount of heat gained or lost by a substance is equal to the product of?
mass times the temperature change rimes specific heat capactiy
