Answer:
14a. Endothermic
14b. Exothermic
14c. Exothermic
14d. Exothermic
15. When reported with a negative sign, energy is lost. When reported with a positive sign, energy is gained.
Step-by-step explanation:
If the result is cold, the reaction is endothermic. If the result if hot, the reaction is exothermic.
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