How did dalton gather evidence for the existence of atoms? a. by measuring the masses of elements after compounds are formed b. by calculating the number of subatomic particles in an element c. by observing an element’s atomic structure through a microscope check answer

Two kilograms of air within a piston–cylinder assembly executes a carnot power cycle with maximum and minimum temperatures of 800 k and 300 k, respectively. the heat transfer to the air during the isothermal expansion is 60 kj. at the end of the isothermal expansion the volume is 0.4 m3. assume the ideal gas model for the air. determine the thermal efficiency, the volume at the beginning of the isothermal expansion, in m3, and the work during the adiabatic expansion, in kj.