Question 1 (2 points) Where is energy stored for chemicals? In the nucleus In the products only In the chemical bonds In the reactants only Question 2 (3 points) Select each statement that is true about endothermic reactions. Energy is absorbed The products have more energy than the reactants Temperature of the surroundings decreases Temperature of the surroundings increases The reactants have more energy than the products Energy is released Question 3 (1 point) Exothermic reactions release heat. True False Question 4 (4 points) 30 S 4 F1 F2 F3 F7 F8 X @ # % 2 3 4 6 8 Q W E R T Y U A S D F G HQuestion 4 (4 points) Does this graph represent an endothermic or exothermic chemical reaction? Explain your reasoning. Reactants Potential Energy AH Products Reaction Progress - AQuestion 1 (1 point) This reaction progress diagram shows the changes during a chemical reaction and the effects on energy. How has the energy changed from reactants to products? Potential Energy Reactants Products Reaction Progress a) Energy is absorbed b) Energy is doubled c) Energy is halved O d) Energy is released Question 2 (1 point) MacBook Air A 20 S F1 @ # $ 9 O 2 A W 5 6 O Q W E R T Y U J K A S D F G H C B M Z X V NQuestion 2 (1 point) When the reaction shown is conducted in an isolated container, the temperature drops. What conclusion can be drawn about the bond energy of products and CHO, NaHCO. NaC, H,O H,O CO, acetic acid sodium bicarbonate sodium acetate water carbon dioxide reactants? a) More energy was absorbed in the formation of chemical bonds than released in the breaking of chemical bonds. b) Less energy was absorbed in the breaking of chemical bonds than released in the formation of chemical bonds c) More energy was absorbed in the breaking of chemical bonds than released in the formation of chemical bonds. d) Less energy was absorbed in the formation of chemical bonds than released in the breaking of chemical bonds. Question 3 (1 point) This reaction progress diagram shows the changes during a two-step chemical reaction and the effects on energy. For the overall reaction, how does the energy change from reactants to products? MacBook Air 30 F10 Fi 2 3 @ # yo 3 5 6 7 18 O O 2 W E R T Y U 0 Q S D F G H C K A Z X C V B N MThis reaction progress diagram shows the changes during a two-step chemical reaction and the effects on energy. For the overall reaction, how does the energy change from reactants to products? Potential Energy Reaction Progress a) Energy is Absorbed O b) Energy is Released c) Energy is Doubled O d) Energy is Halved Question 4 (1 point) MacBook Air 30 PIL F10 a N W 4 6 18 O O Q W E R T Y U O P A S D F G H J K Z X C V B N MQuestion 4 (1 point) In many thermodynamically favored reactions, the total bond energy of the products is lower than the total bond energy of the reactants. Therefore, thermodynamically favored reactions are often Endothermic Conducted in cold conditions Exothermic Conducted in warm conditions Question 5 (1 point) When energy is absorbed in process, which type of reaction is it? sublimation fusion exothermic endothermic Question 6 (5 points) Match the terms with the expressions listed. Cause(s) the temperature of the surroundings to decrease. Cracking open a cold-pack MacBook Air 30 PIL F10 F3 # $ O N 3 6 8 E R T Y U O Q W S D G H J K A F Z X C V B N M Tendothermic Question 6 (5 points) Match the terms with the expressions listed. Cause(s) the temperature of the surroundings to decrease. Cracking open a cold-pack Absorb(s) energy from the 1. Endothermic surroundings 2. Exothermic Burning Wood Cause(s) the temperature of the surroundings to increase