anonymous
  • anonymous
How can I tell whether a reaction is exothermic or endothermic just by looking at the formula? ex. 21.0 kcal/mole + C(solid) + 2S(solid) --> CS(sub 2) (liquid)
Chemistry
  • Stacey Warren - Expert brainly.com
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schrodinger
  • schrodinger
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JFraser
  • JFraser
when energy is included in a reaction, whether it is used as a reactant or product will tell you if the reaction is endothermic or exothermic. A reaction that uses energy as a reactant must draw it in from the surroundings, so the reaction will be ENDOthermic. A reaction that producexs heat as a product will send it out into the surroundings, and the reaction will be EXOthermic

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