Respuesta :
The correct answer is the amount of ethane decrease. Because this reaction is an exothermic reaction and the heat is a product of the reaction, So when the number of temperature increases, so (More heat will be added) So the reaction will go leftward (towards reactants) So the amount of c2h4 & H2 Will increase and the amount of ethane C2H6 will decrease. Hope this helps you!:)