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?

Asolution of sodium hydroxide was titrated against a solution of sulfuric acid. how many moles of sodium hydroxide would react with 1 mole of sulfuric acid?

Electrons are extremely important to what area of technology? a) anti-aging research b) household product development c) electronics d) drug discovery

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.