When an exothermic reaction takes place, the reaction mixture gives out heat because _______________________.Question 5AnswerA.more energy is released when new bonds are formed than is taken in when existing bonds in the reactants are broken.B.the radiation energy produced by the reaction has to be got rid of via diffusion.C.in an exothermic change, the products are less stable than the reactants.D.energy is always absorbed in a chemical change which makes new substances.Clear my choiceQuestion 6Not yet answeredMarked out of 2.00Flag questionTipsQuestion textIn an exothermic reaction__________________________.Question 6AnswerA.energy is released to the surroundings and the temperature of the surroundings increases.B.energy is absorbed from the surroundings and the temperature increases.C.energy is released to the surroundings and the temperature of the surroundings decreases.D.energy is absorbed from the surroundings and the temperature of the surroundings decreases.

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.

In an exothermic reaction, which is greater: the energy released from forming new bonds, or the energy needed to break existing bonds?

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

Which of the following is true for an exothermic reaction?Group of answer choicesHeat is taken in and ΔH is positiveHeat is taken in and ΔH is negativeHeat is given out and ΔH is positiveHeat is given out and ΔH is negative

Which of the following statements is true?Breaking bonds and making bonds are both endothermicBreaking bonds is endothermic, making bonds is exothermicBreaking bonds is exothermic, making bonds is endothermicBreaking bonds and making bonds are both exothermic2When calculating energy changes from bond energies, what is the first thing you should do?Calculate the bond energies of the reactantsSubtract the bond energies of the products from those of the reactantsBalance the equationCalculate the bond energies of the products3If a reaction requires more energy to break the bonds in the reactants than the amount of energy released when new bonds are formed, what does this tell us?It is exothermicThe product is a gasIt is endothermicThe reactant is a solid4Calculate the energy required to break the bonds in propane (C3H8) given the following bond energies: C-C = 347 kJ/mol; C-H = 413 kJ/mol.1520 kJ/mol3998 kJ/mol4345 kJ/mol760 kJ/mol