What is a chemical reaction that absorbs heat called?A.A thermal energy reactionB.A thermodynamic reactionC.An endothermic reactionD.An exothermic reactionSUBMITarrow_backPREVIOUS

Which of the following refers to the heat of a chemical reaction as the energy that is absorbed or released when a reaction takes place?StoichiometryChemical ReactionVaporizationHeat of Reaction

1. The minimum amount of energy that is needed to start a chemical reaction is called ___________________________.2. A chemical reaction in which a substance combines with oxygen and releases energy is called ________________.3. A chemical reaction that releases thermal energy is called _____________________.4. Chemical reactions that absorb thermal energy are called ____________________.5. A __________________________________reaction in one in which the two negative ions in two compounds switch places, forming two new compounds.6. A chemical reaction in which one element replaces another element in a compound is called ____________________.7. A substance that increases reaction rate by lowering the activation energy of a reaction is called _______________.8. A __________________ reaction is one where one compound breaks down and forms two or more substances.9. A ___________________reaction is one in which two or more substances combine and form one compound.10. A substance that slows, or even stops a chemical reaction is called a ____________________.11. The starting substances in a chemical reaction are the ____________________.12. A ________________________________________ is a process in which atoms of one or more substances rearrange to form one or more new substances.13. The substances produced by the chemical reaction are the ______________________.14. A number placed in front of an element symbol or chemical formula in an equation is called a __________________.15. This states that the total mass of the reactants before a chemical reaction is the same as the total mass of the products after the chemical reaction. __________________________________________16. Breaking a chemical bond _____________ energy from the surroundings.17. Mass is conserved in a chemical reaction because ____________________________.18. Catalysts are _____________________________changed during chemical reactions.19. Chemical reactions can be sped up by doing what?20. How would you slow down a chemical reaction?

Which term refers to a reaction that releases heat to its surroundings?A.EndothermicB.EntropicC.EnthalpicD.Exothermic

What happens to heat during an endothermic and exothermic process?Question 24Select one:a.Both endothermic and exothermic processes release heat energy overall.b.An endothermic process absorbs heat energy, while an exothermic process releases heat energy.c.Both endothermic and exothermic processes absorb heat energy overall.d.An endothermic process releases heat energy, while an exothermic process absorbs heat energy.

Describe what a chemical reaction is, in terms of the substances involved and the atoms that make them up.