1) Thermochemistry is the study of __________ changes when chemical reactions happen. a) temperature b) solubility c) heat d) physical 2) ____________ reaction releases heat to the surrounding. a) Exothermic b) Endothermic 3) Example of exothermic reaction is ...... a) baking of cake b) burning of paper c) melting of ice 4) When heat is released to the surroundings, the surrounding temperature will ...... a) decreases b) constant c) increases 5) Reaction between baking soda and vinegar is an _________________ reaction. a) exothermic b) endothermic 6) The product of the ___________ reaction is colder than the reactants. a) endothermic b) exothermic 7) Which of the following is an exothermic reaction? a) calcium chloride and water b) potassium nitrate and water c) ammonium chloride and water

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