Methane gas (CH 4) reacts with oxygen gas (O2) according to the equation below. CH4 +202 + CO2 + H20+ energy
This reaction releases 890 kJ of energy for every mole of methane consumed.
Part 1. Is this reaction endothermic or exothermic?
Part 2. What is the enthalpy change value for this reaction?
Part 3. Explain in terms of potential energy, which has more energy -the products or
the reactants. Explain your response.

One way in which the useful metal copper is produced is by dissolving the mineral azurite, which contains copper(ii) carbonate, in concentrated sulfuric acid. the sulfuric acid reacts with the copper(ii) carbonate to produce a blue solution of copper(ii) sulfate. scrap iron is then added to this solution, and pure copper metal precipitates out because of the following chemical reaction: (s) (aq) (s) (aq) suppose an industrial quality-control chemist analyzes a sample from a copper processing plant in the following way. he adds powdered iron to a copper(ii) sulfate sample from the plant until no more copper will precipitate. he then washes, dries, and weighs the precipitate, and finds that it has a mass of .