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List three signs that could make you think a chemical reaction might be taking place?
Formation of bubbles or gas: Gas evolution can indicate a chemical reaction is occurring. Change in color: A sudden change in color could be a sign of a reaction, such as a shift from clear to cloudy. Temperature change: If the reaction generates heat (exothermic) or absorbs heat (endothermic), it can be an indication that a chemical reaction is taking place.
Why is there a Physical reaction when you lie?
A reaction that is obvious when telling a lie is a psychological reaction. People subconsciously do these things, and show signs of distress, because they are scared.Ê
What is the definition chemical change?
Chemical ChangesAs opposed to a physical change, chemical changes are present when the substance undergoes a chemical reaction and produces a new substance. A chemical change is a chemical reaction that will always take place for there to be a chemical change. Signs that a reaction is taking place: Formation of gases (bubbles), Color change, production of heat or light, and the formation of a solid. a change in composition and characteristics of matter.new substance maybe formed.original substance and form may be lost.new color and shapeExamplesFermentationPhotosynthesisRusting nailSpoiling milkDigesting food
What are four possible signs that a chemical reaction has taking place?
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 chemiluminescence -formation of new compounds
What signs that a physical change has taken place in water?
hydrogen and oxygen gas are given off
What are signs of a physical reaction?
Signs of a physical reaction can include changes in appearance, such as swelling, redness, or rashes; alterations in bodily functions, like increased heart rate or difficulty breathing; and symptoms like nausea or vomiting. Other indicators may involve pain or discomfort in specific areas, muscle tension, or fatigue. These reactions can result from various stimuli, including allergens, infections, or physical injuries.
What are the signs of an exothermic reaction?
The reaction vessel will warm/hot to the touch. 'Exothermic' ; het coming out. Conversely, if the reaction vessel feels cool/cold to the touch it is Endothermic ; taking in heat from its surroundings.
What are signs of someone taking Roxy pills?
where are the signs is taking Roxy pills
what are the physical signs of high cholesterol?
what are the physical signs of high cholesterol?
What are the five signs of a physical reaction?
colour change gas bubbles new substance formed texture changes something else i don't know about.
What are the signs of physical change from a chemical change?
Signs of a chemical change include the formation of a new substance, a change in color, production of gas or bubbles, release of heat or light, and a change in odor. These changes are not easily reversible and often involve the rearrangement of atoms.
What are 4 signs that a physical reaction took place?
A change in state. It can always be changed back into its origanal state. (Ex. Melting, boiling, evaporation, freezing) Other ex. melting butter, shredding paper, mowing the grass, or liquid water to ice
