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What is true for the following reaction? ca(s) + 2c(s) cac2(s) + 62.8 kj it is an endothermic reaction and ∆h= +62.8 kj. it is an endothermic reaction and ∆h= -62.8 kj. it is an exothermic reaction and ∆h= +62.8 kj. it is an exothermic reaction and ∆h= -62.8 kj. this reaction will not occur.
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If I read correctly, the amount of heat (+ 62.8Kj) is to the right of the reaction.
If the heat is on the products (right side of the reaction), that means the reaction is exothermic (heat is released as a product). exothermic reactions have negative values of ΔH. so the values for this ΔH = -62.8 kj.
the answer is “It is an exothermic reaction and ∆H = -62.8 kJ”
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