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Why might the typical boiling point change?
The typical boiling point of a substance can change due to factors such as changes in atmospheric pressure, the presence of impurities in the substance, and variations in the composition of the substance itself. Additionally, the boiling point of a substance can be affected by the altitude at which it is being boiled.
When two substances are mixed they might form a new substance What would indicate that a new substance has been formed?
Some indicators of a chemical reaction are: - change of color - change of odor - release of a gas - change of the temperature - change of the viscosity - formation of a precipitate - change of general appearance - possible explosion - possible chemiluminiscence - formation of new compounds
How would you determine if a chemical change has occurred?
You can determine if a chemical change has occurred by looking for signs such as a change in color, formation of a precipitate, evolution of gas, or release of heat or light. Additionally, if the chemical composition of the substance has been altered, it is likely that a chemical change has taken place.
Which of the following is a definite indicator that a chemical change has occured?
Definite indicators of a chemical reaction include exothermic reactions (heat), colour change, bubbles and there might be a few morea new substance forms (study island)
Why is baking soda is a chemical change and physical change?
Baking soda undergoing a chemical change occurs when it reacts with an acid to produce carbon dioxide gas, changing into a new substance. A physical change involving baking soda might be when it is dissolved in water, as it remains chemically the same but changes form.
When a substance is heated its temperature increases. What other change might be observed?
Ordinarily when a substance is heated it expands. In some cases it melts. In some cases it vaporizes/evaporates.
What change might you observe after phosphorus and hydrogen react to form the compound phosphine?
When heated, the new substance will turn red.
When a substance is heated its temperature increases what other change it might have?
It could melt, boil or soften. Alternatively it may change chemically, either catching fire or decomposing.
What could be the controlled variables in a lab where you heat NaHCO3 with a burner to find out what amount of the gas CO2 is formed?
Many aspects of this procedure could be varied, among them:length of time substance is heatedwhat substance is heated, alternatives might be Na2CO3 and NaOHhow strongly substance is heated
What physical changes may take place when a substance is heated?
When a substance is heated, it may undergo physical changes such as melting (solid to liquid), boiling (liquid to gas), sublimation (solid to gas), or expansion when the particles move faster and spread apart. Additionally, some substances might change color, texture, or shape due to the heat affecting their molecular structure.
Does a chemical change always produce heat?
adding heat to a substance might produce a new gas, resulting in a chemical change for example when baking powder is heated it produces carbon dioxide gas which is needed to make a cake fluffy and light.
What are two observations you might make when a physical change occurs?
Change in state: One observation would be a change in the physical state of the substance, such as from solid to liquid or gas. Reversibility: Another observation might be that the physical change is typically reversible, meaning the substance can return to its original state by reversing the process that caused the change.
How long does it take to install a heated driveway?
Not nearly as long as you might think. First, you must decide that you want a heated driveway. Then just wait a little while for the seasons to change and before you know it, VOILA! the driveway is heated.
What do you call a gooey substance that you might call gross Change one letter from lime?
slime
What Three Things can happen when a Chemical Reaction occur?
A chemical reaction can change a substance into a solid, liquid, or gas. It may cause a substance to explode or could cause no change at all.
As long as conditions such as what do not change the density of a substance dose not change?
As long as the temperature and pressure remain constant, the density of a substance will not change. Density is determined by the mass of a substance and its volume, and as long as these factors remain constant, the density will remain the same.
Why might the typical boiling point change?
The typical boiling point of a substance can change due to factors such as changes in atmospheric pressure, the presence of impurities in the substance, and variations in the composition of the substance itself. Additionally, the boiling point of a substance can be affected by the altitude at which it is being boiled.
