1. (5 pts) 10g of ice at -5°C added to 40 g of water at 11°C. The final configuration is an ice-water mixture at 0°C. What is AS for the ice-water system? a) 6.74 J/K b) -0.13 J/K c) 6.61 J/K d) 0.13 J/K 2. (5 pts) 3 moles of O2 at 1 atm and 500K expands isothermally to 0.3 m³. What is the change in entropy of the gas? a) 22.23 J/K b) 7.41 J/K c) -7.41 J/K d) -22.23 J/K 3. (5 pts.) A 1.5 kg mass is vibrating in a spring attached system in which the restoring spring constant is 200 N/m. The amplitude of vibration is 25 cm. Find the energy of the system, and maximum velocity. a) 62500 J, 289 m/s b) 6.25 J, 2.89 m/s c) 625 J, 28.9 m/s d) none of these. 4. (5 pts.) In the problem (3) above, find the equation for displacement (function x(t)) if x = A at t = 0. a) x(t) = 0.25 sin(11.55t) b) x(t) = 0.25 cos(11.55t) c) x(t) = 0.25 cos(133.3t)