An engine operates in a carnot cycle that uses 1 mole of an ideal gas as the working substance and operates from a most compressed stage of 100 Nm^-2 and 327k, it expands iso thermally to a pleasure of 90Nm^-2 and then adeabatically to most expanded stage of 27k. Calculate the change in energy, the heat, the work done and the efficiency of the cycle?

Aperfume bottle is dropped in the corner of a room. the odor of the perfume can be detected on the other side of the room. which statement best describes this observation?

Chlorine and water react to form hydrogen chloride and oxygen, like this: 2cl2 (g) + 2h2o (g) → 4hcl (g) + o2 (g) also, a chemist finds that at a certain temperature the equilibrium mixture of chlorine, water, hydrogen chloride, and oxygen has the following composition: compound concentration at equilibrium cl2 0.55m h2o 0.57m hcl 0.53m o2 0.34m calculate the value of the equilibrium constant kc for this reaction. round your answer to 2 significant digits.

What is the mass of 0.750 mole of aluminum oxide, al2o3?