If a liter of water is heated from 20 c to 50 c, what happens to its volume? a. the volume decreases. b. the volume increases. c. the volume first increases, then decreases. d. the volume first decreases, then increases, select the best answer from the choices provided

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.