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Is the boiling of water until it becomes water vapor is a physical or chemical change?
It's a physical change. All changes of state (solid to liquid, or liquid to gas, for example) are physical changes.
Which substance if any showed no change when heated?
Water showed no change when heated at its boiling point. The temperature remains constant during the phase change from liquid to gas until all of the water has evaporated.
What happen to the temperature boiling water as it's boil?
When water is boiling, the temperature remains constant, as the energy it is absorbing is being used to change the liquid water into water vapor.
Does the tempura change when the substance is changing state?
Yes, the temperature of a substance can change when it undergoes a state change, such as melting or boiling. During these phase transitions, the temperature remains relatively constant as the energy added or removed is used to break or form intermolecular bonds rather than increase the temperature. For example, during the melting of ice to water, the temperature remains at 0°C until all the ice has melted.
Is heating tungsten until it glows red a chemical or physical change?
Heating tungsten until it glows red is a physical change because the composition of the tungsten does not change. The change in color is a result of the increased temperature causing the atoms to vibrate and emit visible light.
Is the boiling of water until it becomes water vapor is a physical or chemical change?
It's a physical change. All changes of state (solid to liquid, or liquid to gas, for example) are physical changes.
Which substance if any showed no change when heated?
Water showed no change when heated at its boiling point. The temperature remains constant during the phase change from liquid to gas until all of the water has evaporated.
What happen to the temperature boiling water as it's boil?
When water is boiling, the temperature remains constant, as the energy it is absorbing is being used to change the liquid water into water vapor.
Is adding water to pot noodles a physical change?
This depends. Are the pot noodles dry at room temperature? Then not yet .Are the pot noodles in boiling water? Is the water you are adding from the cold water tap? Then, Yes, as boiling will stop until the new water is at boiling temperature.
How is melting and boiling alike?
They are both phase changes, this means that until the melting or boiling are complete the temperature of the system remains at the melting or boiling point, despite the continued input of heat energy.
When you boil water water and there is steam is that a chemical reaction?
No, boiling water is a physical change, not a chemical reaction. The process involves increasing the temperature of water until it reaches its boiling point, causing the water molecules to gain enough energy to change from liquid to gas (steam).
A change in matter from one form to another is?
A change in the physical state of matter is a physical change.
When can you withdraw heat from something without lowering it's temperature?
You can withdraw heat from something without lowering its temperature during a phase change, such as during melting or boiling. As the substance absorbs energy to undergo a change in state, its temperature remains constant until the phase change is complete.
When you boil potatoes is your cooking time reduced if the water is vigorisly boiling instead of gently boiling?
No, because the temperature does not change until a phase change is complete so it will not make a difference.
Is hammering gold until it becomes flat a physical change or chemical change?
Pounding a gold coin into a different shape would probably not effect a chemical change. If, however, the pounding produced enough heat to meal the coin, some chemical change could take place.
If a liquid sample of naphthalene is heated and remains at 218 and degC until it is completely vaporized you know that 218 and degC is the of naphthalene.?
Boiling point.
How does he amount of energy change during boiling?
During boiling, the amount of energy remains constant as the temperature of the substance stays the same until all of it has converted into vapor. Once boiling starts, the added heat energy is used to break the intermolecular bonds holding the liquid together, rather than increasing the temperature.
