Astudent carried out this reaction with methane as the limiting reagent. a 12.0 g quantity of methane was used, and the student collected 22.0 g of carbon dioxide. what was the percent yield?

The percent yield is 66.7%

Explanation:

1. The balanced chemical reaction to obtain carbon dioxide from the methane is:

2. Calculathe the theoretical quantity of carbon dioxide.

As the problem says that the limiting reagent is the methane, all the calculations will be made from this quantity:

3. Calculate the percent yield:

Percent yield =

Percent yield =

Percent yield = 66.7%

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.