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What else can I help you with?
When alcohol is heated is it chemically changed?
No. If you heat liquid alcohol enough it will evaporate and you will have alcohol vapor, but its still alcohol. Making it a physical change. If you expose alcohol to a flame and burn it, that will change the alcohol into carbon dioxide and water, then it's a chemical change.
If water boils at 100degrees and alcohol boils at 70degreesIf you have 500ml of each at a temperature of 20degrees which liquid would require most heat energy to make it boil?
Alcohol would require more heat energy to reach its boiling point of 70 degrees Celsius compared to water which needs to reach 100 degrees Celsius. Therefore, alcohol would require more heat energy to boil.
Is molding a piece of silver a physical change?
Molding a piece of silver using heat is a physical change. This is because it is changing shape and not chemically changing the silver.
What phase change occurs before and after rubbing alcohol absorbs?
Before rubbing alcohol absorbs, it is a liquid. While it absorbs (heat), the phase change occurring is evaporation. As the alcohol takes in heat, it turns into a gas.
Which state changes require heat and which gives off heat?
Endothermic processes require heat to occur, such as melting and vaporization, because energy is absorbed from the surroundings. Exothermic processes give off heat, such as freezing and condensation, because energy is released to the surroundings.
What is the specific heat of mixture and how does it affect the overall temperature change in a system?
The specific heat of a mixture is the amount of heat needed to raise the temperature of the mixture by 1 degree Celsius. It affects the overall temperature change in a system because substances with higher specific heat require more heat to raise their temperature, while substances with lower specific heat require less heat. This means that the specific heat of a mixture determines how much heat is needed to change its temperature, impacting the overall temperature change in the system.
Is it possible to fire a gun on the moon?
Yes- although the heat/cold would make it unreliable. Gunpowder does not require oxygen to fire- it carries its own oxygen chemically combined.
What do you call the substance that reacts chemically with another to produce heat?
The substance that reacts chemically with another to produce heat is called a "reactant."
How do you create heat chemically?
rubbing your hands together
Which local materials will keep the ice from melting fast?
The Answer: Alcohol The ice begins pulling heat (energy) from the alcohol. It is not the ice cooling the alcohol it is the alcohol that transfers heat to the ice (solid water). The ice draws heat from the warmer alcohol inducing the ice to melt. This is because the freezing point of the alcohol is much lower than the ice. If we were to keep the ice in the glass (by adding more) the rate of melting of the ice would slow because the heat (energy loss) of the alcohol has been reduced. But it would indeed continue to draw heat from the alcohol just more slowly. {this of course would require no atmosphere heat (energy) from contacting either the ice or the alcohol.} If we had solid CO2 (dry ice) it could draw enough energy (heat) from the alcohol to freeze it solid. {this of course would require no atmosphere heat (energy) from contacting either the ice or the alcohol. Plus a lot of dry ice to replace what has melted or sublimated away.} By: Mark L. Vizon
Can nylon change?
Nylon itself does not change chemically, but it can undergo physical changes such as stretching, shrinking, or fading with exposure to heat, light, or chemicals. These changes can affect the appearance and properties of the nylon material.
Is heat produced when two liquids are mixed a physical change?
No and yes. If the two liquids do not react chemically then its a physical change, called the enthalpy of mixing, heat of mixing, which can be exothermic or endothermic. If the two liquids react then the heat produced would be chemical.
