Which of the following assumptions appears reasonable for the isothermal process: N2 (g,1 bar) N2 (g,200 bar), T = 25C Select one: a. U -0, -0 b. U -0, + 0 c. U + 0, 0 d. U + 0 , 0 e. None of the above Hot water is placed into an insulated thermos and sealed. The thermos is shaken vigorously and then stopped. What would the energy balance look like for this process? Select one: a. - Q- Ws-k - b. - Q- Ws -k c. - Ws - d. - s e. None of the above