PLEASE HELP M ASAP 50 PTS When methane, CHa, is combusted, it produces carbon dioxide, CO2, according to the unbalanced equation: CH4 + 02 - CO2 + H20.
Write the balanced equation for this reaction, and explain how it is possible for 10 grams of methane fuel to burn and emit 27 grams of carbon dioxide. Discuss whether or not this reaction obeys the law of conservation of mass.

The answerer is CH4 + 2O2 → CO2 + 2H2O

Explanation: }

Answer & Explanation:

The balanced equation for the reaction of combustion of methane:

CH₄ + 2O₂   →  CO₂ + 2H₂O

    reactants   products

C       1                 1

H      4                 4

O      4                 4

Moles of Methane = mass ÷ molar mass

                              = 10 g ÷ 16.04 g/mol

                              = 0.6234 mol

Since the mole ratio of CH₄ to CO₂ based on the balance equation is 1:1, then for every mole of  CH₄ reacted, 1 mole of CO₂.

∴ since mole of  CH₄ = 0.6324 mol

then moles of  CO₂  = 0.6324 mol

⇒ Mass of  CO₂ produced = moles × molar mass

                                            = 0.6324 mol × 44.01 g/mol

                                            = 27.83 g

                                            ≈ 27 g (as the question predicts).

Law of Conservation of Mass:

The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations.   According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.

they vary. it used to be meat, grain, bread, candy, beverages, donuts, and fruits/vegetables. now they added exercise in.

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.