What Reaction?
Changes in Matter, etc.
Definitionally Speaking, of Course
What is That and How Does it Work?
Mishmash
100
Examples of these kinds of reactions include ice melting, baking bread, cooking an egg, and plants producing sugar by photosynthesis.
What are Endothermic Reactions? Endothermic reactions are chemical reactions that use heat as part of the reactant. Heat is absorbed into the reaction in order for it to continue. There is a single feature which may be used to identify any endothermic reaction and that is the absorption of heat.
100
This type of change does not produce new substances. The substances that exist before and after the change are the same, although they may have different physical properties.
What is a "Physical Change" in matter?
100
This is a description of a reaction using element symbols and chemical formulas.
What is a Chemical Equation?
100
All reactions require this to start the breaking of bonds. This is the minimum amount of energy needed to start a chemical reaction.
What is "Activation Energy?"
100
This is a catalyst that speeds up chemical reactions in living cells.
What is an enzyme?
200
This "blanket term" is what you call a process in which atoms of one or more substances rearrange to form one or more new substances. The starting substances and the substances produced have different physical and chemical properties.
What is a chemical reaction?
200
A reaction does not destroy atoms, and it does not form new atoms. All atoms at the start of a chemical reaction are present at the end of the reaction. This absolute is stated plainly as this "law" or "rule:"
What is the law of conservation of mass?
200
This is " a substance produced by a chemical reaction:"
What is a Product?
200
This is the amount of the exposed outer area of a solid. Increasing this increases reaction rate.
What is Surface Area?
200
How many Carbon atoms are in this molecule? (You have to imagine the "2" is a subscript "2" I couldn't get the font right!) CO2
What is the number "1?"
300
This is what you call a type of chemical reaction in which one compound breaks down and forms two or more substances.
What is a "Decomposition Reaction?"
300
A change in temperature (warming or cooling) something smelling different, or even a release of light are all indications, but not absolute proof of this kind of change in matter.
What is a Chemical Change (or Chemical Reaction?)
300
This is a chemical reaction in which a substance combines with oxygen and releases energy.
What is a "Combustion Reaction?"
300
This is a substance that slows, or even stops, a chemical reaction and can slow or stop the reactions caused by enzymes.
What is/are inhibitors?
300
What kind of reaction is this? Reactants + Thermal Energy -------> Products
What is (the formula for) an Endothermic Reaction
400
This is a type of chemical reaction in which two or more substances combine and form one compound.
What is a "Synthesis Reaction?"
400
A chemical equation includes the substances that react and the substances that form in a chemical reaction. The starting substances in a chemical reaction are called this.
What is/are reactants?
400
This is a number placed in front of an element symbol or chemical formula in an equation, depicting the number of molecules or atoms which follow it.
What is a Coefficient?
400
This is a substance that increases reaction rate by lowering the activation energy of a reaction.
What is a catalyst?
400
When atoms of two or more elements bond, they form this.
What is a "compound." (I'll take "molecule, too.)
500
This is what you call type of chemical reaction in which the negative ions in two compounds switch places, forming two new compounds.
What is a "Double Replacement Reaction?"
500
This is the process in which atoms of one or more substances rearrange to form one or more new substances. It is synonymous with "chemical change."
What is a "Chemical Reaction?"
500
This is a type of chemical reaction in which one element replaces another element in a compound.
What is a "Single-Replacement reaction?"
500
In this type of reaction, more energy is released when the products form than is required to break the bonds in the reactants. Therefore, the overall reaction releases energy. This type of reaction releases energy and as a result, the bonds of the reactants contain more energy than the bonds of the products.
What is an Exothermic Reaction?
500
What's the best way to balance this equation? CH4 + O2 → CO2 + H2O (ALL NUMBERS HERE ARE SUBSCRIPTS AS I COULD NOT GET THE FONT TO DO LITTLE NUMBERS)
What is CH4 + 2O2 → CO2 + 2H2O
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