1) Does exothermic mean that energy is taken in to the system or released to the surroundings?  a) Taken in to the system b) Released to the surroundings 2) What is the opposite of exothermic? a) enthalpy b) enthraperthic c) endoskeleton d) endinious e) endothermic f) poilikothermic 3) Citric acid and sodium hydrogencarbonate react together (temperature decreases) Is it exothermic or endothermic? a) Endothermic b) Exothermic 4) Any combustion (burning in oxygen) reaction. Is it exothermic or endothermic? a) Exothermic b) Endothermic 5) Ice melting in a summer drink. Exothermic or endothermic? a) Endothermic b) Exothermic 6) Water freezing on a cold day. Exothermic or endothermic? a) Endothermic b) Exothermic 7) Which of these is the odd one out? a) Methane burning in air b) Neutralisation c) Iron oxidising d) Thermal decomposition e) Magnesium and hydrochloric acid 8) What word means "the chemicals that are used up in the reaction"? a) Products b) Reactants c) Molecule d) Elements e) Ingredients f) Acids 9) What word means "the chemicals that are made in the reaction"? a) Products b) Reactants c) Molecules d) Elements e) Ingredients f) Acids 10) Is this reaction exothermic or endothermic? a) Exothermic b) Endothermic 11) Is this reaction exothermic or endothermic? a) Exothermic b) Endothermic 12) Is this reaction exothermic or endothermic? a) Exothermic b) Endothermic

Exothermic and Endothermic reactions

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