Sometimes, the hot water produced by a solar water heater is not warm enough to meet the needs of the occupants of a building. A traditional water heater inside the building supplies additional thermal energy to the solar-warmed water. How can this method still reduce the overall amount of natural gas or electricity a building uses?

Calcium carbonate decomposes at high temperatures to give calcium oxide and carbon dioxide as shown below. caco3(s) cao(s) + co2(g) the kp for this reaction is 1.16 at 800°c. a 5.00 l vessel containing 10.0 g of caco3(s) was evacuated to remove the air, sealed, and then heated to 800°c. ignoring the volume occupied by the solid, what will be the mass of the solid in the vessel once equilibrium is reached?