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When a substance dissolves it undergoes a chemical change physical change molecular change?
When a substance dissolves, it undergoes a physical change, not a chemical change. This is because the molecules of the solute are dispersed in the solvent but do not undergo any chemical reactions. The process of dissolving is a result of the attraction between the solute and solvent molecules.
What happens to the bonds of a starting substance?
When a starting substance undergoes a chemical reaction, its bonds are broken and reformed. The existing bonds in the reactants break due to the input of energy, allowing atoms to rearrange and form new bonds in the products. This process results in the transformation of the original substance into different chemical compounds. Ultimately, the nature and strength of the bonds determine the stability and reactivity of the resulting products.
Which of the TAKES PLACE WHEN A SUBSTANCE UNDERGOES A CHEMICAL CHANGE?
When a substance undergoes a chemical change, its molecular structure is altered, resulting in the formation of new substances with different properties. This process often involves breaking and forming chemical bonds, and it can be triggered by factors such as heat, light, or a reaction with another chemical. Common indicators of a chemical change include color change, gas production, temperature change, and the formation of a precipitate.
What happens when a pure substance undegoes a chemical change?
When a pure substance undergoes a chemical change, its molecular structure is altered, resulting in the formation of one or more new substances with different chemical properties. This process is typically accompanied by observable signs such as color change, gas production, or temperature change. Unlike physical changes, where the substance retains its original identity, chemical changes are often irreversible under normal conditions. Examples include combustion, rusting, and fermentation.
What is a substance that undergoes a physical change?
A substance that undergoes a physical change is water when it freezes into ice. This process changes the state of the water from liquid to solid without altering its chemical composition. Similarly, when ice melts back into water, it undergoes another physical change. Other examples include the melting of wax or the dissolving of sugar in water.
Which feature of an enzyme determines the chemical process it aids?
The feature of an enzyme that determines its chemical process it aids is it's shape. This can be compared to a lock and key. Where an enzyme, as the key, must have a certain structure or multi-dimensional shape that matches a specific section of the substrate, the compound or substance that undergoes the change.
Chemical change definition?
A chemical change occurs when a substance undergoes a chemical reaction that results in the formation of new substances with different chemical properties. This often involves the breaking and forming of chemical bonds. Examples include rusting of iron, burning of wood, and digestion of food.
Is burning of coal a chemical change?
Yes, burning coal is a chemical change. During this process, the coal undergoes a chemical reaction with oxygen in the air to produce heat, carbon dioxide, and other byproducts. This results in a new substance being formed, indicating a chemical change.
A substance which helps make a chemical change happen but is not changed itself in the process is called an?
The answer is catalyst
This substance can trap light energy and convert it to chemical energy?
Chlorophyll is the substance responsible for trapping light energy in plants through the process of photosynthesis, where it converts this energy into chemical energy in the form of glucose.
What is a substance that speeds up a chemical process?
catalyst-by lowering activation energy
How is heat measured in a calorimeter?
Heat is measured in a calorimeter by monitoring the temperature change that occurs when a substance undergoes a chemical reaction or physical process within the calorimeter. This change in temperature is used to calculate the heat transfer associated with the reaction or process.
What is a physical change rather than a chemical change?
`A physical change is one in which matter is changed into another physical state without changing its chemical constitution(eg-ice melts to water,in both case substance is H2O).A chemical change is where there is a chemical change of the substance during the process(eg-CaCO3 is heated to form CO2 and CaO,here the new substance formed is unrelated chemically to parent substance.)
Is evaporation a chemical property?
It is not a property it is the process of turning a liquid into a gas. The enthalpy change of evaporation would be a chemical property.
Is decaying dung a physical or chemical change?
It is a chemical change because it can not be converted back to the original substance. Once dung starts decaying it can not reverse the process.
Reaction of copper and heat is physical change or chemical change?
The reaction of copper with heat is a physical change because no new substances are formed. When copper is heated, it undergoes a change in state from solid to liquid without changing its chemical composition.
Is combustion a physical change or a chemical change?
Combustion is basically a chemical reacting with oxygen to become the oxide and water is produced. So when alcohol combusts, for example, it is changed (burned) to carbon dioxide and water. In other words, there is a chemical change.
