The decomposition of ZnCO3(s) into ZnO(s) and CO2 (g) at constant pressure requires the
addition of 71.5 kJ of heat per mole of ZnCO3.
what's the enthalpy

What forms when chemical reactions combine pollution with sunlight?

Which of the following are good traits of a hypothesis? it will be able to be testedit can predict an outcomeit will explain the observationsall of these

Two metal blocks that have slightly different temperatures are placed next to one another. after five minutes, they both have lower but equal temperatures. according to the law of conservation of energy, what  most likelyhappened? energy was created inside the blocks.energy was destroyed inside the blocks.energy was absorbed into the blocks from outside the system.energy was transferred from the warmer block to the cooler block.