2. Methane can be reacted with steam to produce carbon monoxide and hydrogen. The equation for this process is given below.
CH(g) + H2O(g) → CO(g) + 3H2(g)
The table below shows the enthalpy changes of formation for methane, steam
and carbon monoxide.
compound
Hf / kJ mol-1
CH4
-75
H20
-242
СО
-110

Use the Hf values in the table to calculate the enthalpy change for the reaction shown in the equation shown above.

Carbon-14 undergoes radioactive decay in the reaction above. determine the type of radiation emitted in this reaction and describe what is happening to the nucleus during this reaction.

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 .

Reactions in cells take place at about a. 40°c b. 0° c. 100°c d. 60°c