1. Can a given amount of mechanical energy be converted completely to heat? (2pts.) (True or False?) 2. In isothermal expansion the heat absorbed is completely converted to work. Does it violate the Second law of Thermodynamics? If not why not? (4pts) 3. A Carnot Heat Engine operates between 400K and 300K. What is the efficiency of the engine? (2 pts) 4. Calculate the rms speed of nitrogen molecules at 350K. The molar mass is 28.02 g/mole (2pts.) 5. What is the average translational kinetic energy of a molecule at temperature 300 K? (2pts.) Boltzmann constant k = 1.38x10-J/K 6. A metal sheet has a circular hole in it. When heated, the hole increases in size. (True or False) 2 pts. 7. In an adiabatic expansion, the following is true: (2 pts) (@) Q=0 (b) W=0 (c) T is contant