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exothermic reactions-gives off heat
In Chapter 11 we saw two examples of principles of conservation, involving matter and charge, in chemical reactions. Neither the total mass nor the net oxidation number of reactants and products can change during a chemical transformation. Mass and oxidation number are more fundamental properties of substances than are volume, color, texture, density, or electrical conductivity.
A third important property that is conserved is energy. Combustions and many other reactions give off energy in the form of heat, and this makes these processes useful to us. But if we draw an imaginary box around the reacting substances, large enough to contain the substances and everything else they interact with, then the total energy within that box will not change during the reaction. (This is one form of the first law of thermodynamics.)
If the reaction gives off heat energy, then the products must have less energy than the reactants, because this difference is the only source of the heat. Conversely, if the products have more energy than the reactants, this extra energy must be supplied to the reaction from outside
Chemical treaction that gives off heat-EXOTHERMIC Chemical treaction that absorbs heat -ENDOTHERMIC
An exothermic reaction
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A chemical reaction that gives off heat is most likely to be what?
An exothermic reaction is a chemical reaction that gives off heat. In an exothermic reaction, energy is released in the form of heat to the surroundings.
What is the study of heat changes in a chemical reaction?
The study of heat is called thermodynamics.
What is called the ability to produce heat and light in a chemical reaction?
The ability to produce heat and light in a chemical reaction is called combustion. It is a type of exothermic reaction where energy is released in the form of heat and light.
What phrase best describes a exothermic chemical reaction?
A chemical change that gives off heat. Burning paper would be an example.
Do catalysts affect temperature?
A catalyst affects the speed of a chemical reaction. If the chemical reaction gives off heat, the reaction may affect the temperature, but the catalyst by itself doesn't affect the temperature.
What is a chemical reaction gives off heat called?
exothermic reactions-gives off heat
A chemical reaction that gives off heat is most likely to be what?
An exothermic reaction is a chemical reaction that gives off heat. In an exothermic reaction, energy is released in the form of heat to the surroundings.
What term is used for the type of chemical reaction that gives out heat energy?
Exothermic reaction gives free heat (energy).
What is a chemical reaction that's absorbs energy called?
An Endothermic reaction. If you touch the reaction vessel it will feel cool/cold, as it is taking in heat energy. By contract an Exothermic reaction is one that gives out heat. If you touch the reaction vessel it will feel warm/hot as it is liberating heat energy.
What term is used 4 the type of chemical reaction that gives out heat energy?
Exothermic reaction gives free heat (energy).
Chemical reaction that releases energy?
All chemical reactions that release energy in the form of heat are called exothermic reactions.
What is the proper name for a chemical reaction that gives out heat?
combustion
What is a chemical reaction absorbs heat called?
An endothermic reaction.
What chemical reaction produces heat and energy in a star?
it is not a chemical reaction. It is a nuclear reaction and it is called fusion.
What is a reaction called that gives off heat?
exothermic reactions-gives off heat
What is the study of heat changes in a chemical reaction?
The study of heat is called thermodynamics.
What is called the ability to produce heat and light in a chemical reaction?
The ability to produce heat and light in a chemical reaction is called combustion. It is a type of exothermic reaction where energy is released in the form of heat and light.
