. [-l'l Points] DETAILS 5ERCP11 12.1.P.l]l]1. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER An ideal gas is enclosed in a cylinder with a movable piston on top of it. The piston has a mass of 0,000 g and an area of 5.00 cm2 and is free to slide up and down, keeping the pressure of the gas constant. (a) How much work is done on the gas as the temperature of 0.180 mol of the gas is raised from 150C to 295C? :1 (b) What does the sign of vour answer to part (a) indicate? C'- "he surroundings do positive work on the gas. r._; "he gas does positive work on its surroundings. :'._5 'here is no work done. bv the gas or the surroundings. \"deed Help? M| \f3. [-I'I Points] DETAILS 5ERCP11 12.1.P.l]l]3.|'u1|. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Gas in a container is at a pressure of 1.3 atm and a volume of 6.0 m3. (a) What is the work done on the gas if it expands at constant pressure to twice its initial volume? I:J (l3) Ivvhat is the work done on the gas if it is compressed at constant pressure to one-quarter of its initial volume? I:J New Hem? 4. [-PI Points] DETAILS 5ERCP11 12.1.P.l.'ll]5. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A gas expands from f to F along the three paths indicated in the figure below. Calculate the work done on the gas along each of the following paths. 13(3th 10 V (liters! (D 10. [-I1 Points] DETAILS 5ERCP11 12.5.P.l]55. MY NOTES ASK YOUR TEACHER lvvhen a metal bar is temporarily connected between a hot reservoir at Th and a cold reservoir at TCJ the energy transferred by heat from the hot reservoir to the cold reservoir is Qh' In this irreversible processJ find expressions for the change in entropy of the following. (Use any variable or symbol stated above as necessary.) (a) the hot reservoir Sh= H (b) the cold reservoir S= C U (c) the Universe ASU= U Need Help? M| 11. [-I'I Points] DETAILS SERCP'I1 12.5.P.l153. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Sweating is one of the main mechanisms with which the body dissipates heat. Sweat evaporates with a latent heat of 2,430 kakg at body temperature and the body can produce as much as 1.3 kg of sweat per hour. If sweating were the only heat dissipation mechanism, what would be the maximum sustainable metabolic rate, in wattsJ if 31% of the energy used by the body goes into waste heat? : W NeeclHelp? | III-all | 12. [-I1 Points] DETAILS 5ERCP11 12.7.P.l]64. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A Carnot engine operates between 120C and 21C. How much ice can the engine melt from its exhaust after it has done 4.5 x 104 J of work? (The latent heat of fusion for water is 3.33 x 105 Jy'kg.) :kg N... Help? @@