Chemistry, 03.12.2021 17:50 25linm

Chemical reactions either release or store energy. In endothermic reactions, energy is stored as heat, and you might notice a decrease in temperature. In exothermic reactions, heat energy is released, and temperature will increase. Chemical reactions store or release chemical energy, too. Chemical energy is stored in chemical bonds, and when bonds break, that energy is released. According to the passage, what evidence can show if a reaction is endothermic or exothermic?

a. the presence of bubbles
b. a temperature change
c. glass breaking

Answers: 3

Show answers

Other questions on the subject: Chemistry

Chemistry, 21.06.2019 20:50, deanlmartin

Choose all that apply. when creating a graph, you should: determine the x- and y- variables label the scale on the x- and y- axes plot the data points draw a line of best fit to represent the data trend

Answers: 1

continue

Chemistry, 22.06.2019 02:30, jhonpiper

Which element forms an ionic bond with flourine? 1) fluorine 2) carbon 3) potassium 4) oxygen

Answers: 1

continue

Chemistry, 22.06.2019 08:00, gomezyonathan93

An observation that requires measurement is called quantitative observable or qualitative

Answers: 1

continue

Chemistry, 22.06.2019 15:00, levelebeasley1

Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.

Answers: 2

continue

You know the right answer?

Chemical reactions either release or store energy. In endothermic reactions, energy is stored as hea...