How many moles of ethylene (c2h4) can react with 12.9 liters of oxygen gas at 1.2 atmospheres and 297 kelvin? c2h4(g) + 3o2(g) yields 2co2(g) + 2h2o(g) 0.21 moles 0.32 moles 0.63 moles 0.84 moles

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answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.