400 g of heptane is combusted with 7000 g of oxygen a what is a limiting reactant be how many liters of carbon dioxide gas are produced in see how many grams of excess reactant are left

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.

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