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What is and example of a chemical reaction melting water burning a piece of wood dissolving salt in water or breaking a tree branch?
An example of a chemical reaction is burning a piece of wood. During this process, wood reacts with oxygen in the air to produce carbon dioxide, water vapor, and ash, resulting in a chemical change. In contrast, melting water, dissolving salt in water, and breaking a tree branch are physical changes, not chemical reactions, as they do not alter the chemical composition of the substances involved.
When you add baking soda to a salt and vinegar solution is it a chemical change or physical change?
Is the Test tube sealed airtight or open air? Dissolving is a physical change.
Is Water vapor in the air an example of a physical or chemical change?
Physical change
Is humidifiers putting moisture into the air a physical or chemical change?
The humidifier putting moisture into the air is a physical change. It involves adding water vapor, which is a change in the physical state of water from liquid to gas, without altering the chemical composition of the water molecule.
Distinguish between physical and chemical change?
A chemical change is a change involving making and breaking chemical bonds to form new chemicals. For example when wood burns the carbon and hydrogen in the cellulose react with the oxygen in the air, forming carbon dioxide and water. A physical change is one that the chemical changes states and no new chemicals are formed, like melting ice or dissolving salt in water.
What Water vapor in the air turns to liquid water in the form of rain is example?
chemical change
Is burning of hydrogen in air chemical change?
Yes, burning of hydrogen in air is a chemical change because it involves a reaction between hydrogen and oxygen molecules to form water, releasing heat and light energy in the process.
What happens if you put a shiny new nail outside in a wet location and how will the air and water change the nail?
The water and the air makes a chemical change to the nail to make it rust
Is Fog forming an examples of chemical changes?
The formation of fog is a physical change, not a chemical one.
Is this physical or chemical change clouds forms when water vapor in the air condenses?
This is a physical change. When water vapor in the air condenses to form clouds, it is a change in state from a gas (water vapor) to a liquid (water droplets). No new substances are formed.
Is a firework cracking a physical or chemical change?
It is a chemical change as it releases gases into the air.
What is an example of a chemical change that produces light and heat?
reaction of na [sodium] with water or air
