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1) If you combine vinegar and baking soda the temperature drops 15 degrees. What kind of reaction is this? a) Endothermic because the temperature increases b) Exothermic because the temperature decreases c) Endothermic because the temperature decreases d) Exothermic because the temperature increases 2) Boiling water is... a) Endothermic because the temperature increases b) Exothermic because the temperature decreases c) Endothermic because the temperature decreases d) Exothermic because the temperature increases 3) A cold pack is... a) Endothermic because the temperature increases b) Exothermic because the temperature decreases c) Endothermic because the temperature decreases d) Exothermic because the temperature increases 4) When heat enters the system, what kind of reaction has occurred? a) Exothermic b) Endothermic 5) When heat leaves the system, what kind of reaction has occurred? a) Exothermic b) Endothermic 6) When particles break apart, it is... a) An endothermic reaction b) An exothermic reaction c) Both types d) Neither type 7) When particles come together, it is... a) An endothermic reaction b) An exothermic reaction c) Both types d) Neither type 8) An endothermic reaction is one in which energy is a) transferred from the reaction to the surroundings b) taken in from the surroundings to the system. 9) Select the TWO exothermic reactions a) Hand warmer packs b) Car engine c) Ice pack d) Freezing water 10) Select the TWO endothermic reactions a) Hand warmer packs b) Car engine c) Ice pack d) Freezing water 11) What type of reaction is this? a) Endothermic b) Exothermic 12) What type of reaction is this? a) Endothermic b) Exothermic

Endothermic & Exothermic Reactions

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