1) What does the word thermo mean? a) Light b) Water c) Heat d) Energy 2) What does thermochemistry study? a) Colors of chemicals b) Heat changes in reactions c) Shape of molecules d) Sound of reactions 3) What type of reaction releases heat? a) Endothermic b) Neutralization c) Exothermic d) Evaporation 4) What type of reaction absorbs heat? a) Endothermic b) Burning c) Cooling d) Exothermic 5) When ice melts, the process is… a) Neutral b) Endothermic c) Combustion d) Exothermic 6) When water freezes, the process is… a) Boiling b) Photosynthesis c) Endothermic d) Exothermic 7) When ammonium nitrate dissolves in water, the solution becomes cold. What does this tell us? a) The reaction is exothermic b) Heat is released c) Energy is not involved d) The reaction is endothermic 8) The reaction given is exothermic:2H₂ + O₂ → 2H₂O + energy.Which statement is true? a) Energy is absorbed by hydrogen b) Energy is released when water forms c) Energy is stored in oxygen gas d) Energy is neither or lost 9) Which of the following is an endothermic process? a) Boiling of water b) Freezing of water c) Burning of coal d) Condensation of steam 10) Which statement about exothermic reactions is correct? a) ΔH is positive b) The products have higher energy than the reactants c) Heat flows from the surroundings to the system d) The products have lower energy than the reactants

THERMOCHEMISTRY🧪

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