4. In the calorimetry experiment (Part IIB), identify the system a. Reactants b.

Question

4. In the calorimetry experiment (Part IIB), identify the system a. Reactants b. Reactants and products c. Reactants, products, water, and calorimeter d. Water and calorimeter e. Calorimeter only f. Water only 5. In the calorimetry experiment (Part IIB), identify the surroundings a. Reactants b. Reactants, products, water, and calorimeter c. Water and calorimeter d. Calorimeter onlv e. Water only If heat is produced by a chemical reaction, what happens to the temperature of the surr 6. oundings? a. decreases b. increases c. stays the same d. cannot be determined 7. If heat is required for a chemical reaction to occur, where does the energy come from? a. b· c· d· from the chemical reaction itself from the surroundings from the chemicals from the reactants

Explanation / Answer

4. ans: system : B. reactants and products ( the reaction usually)

5. ans: E, water only

6. ans:B, temperature increses , because if heat is evolved in reaction , then it is exothermic reaction and surroundings will get increased temerature.

7. ans: b, from surroundings, then it wil be endothermic reaction.

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