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Please help me on problems one and three. I’m not sure whether or not it is an endothermic and exothermic reaction

Please help me on problems one and three Im not sure whether or not it is an endothermic and exothermic reaction class=

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1. Exothermic, because it’s giving off heat

2. Exothermic, because it’s giving off heat

3. Endothermic, because it’s losing heat