1.) FFTTTFT  
 2.)  (1) buoyant force = weight of displaced fluid  
       (2) P,V,T   PV=nRT  
       (3) spont. heat flow from hot to cold; del(S)>=0; 
            Carnot engine only involves reversible processes
       (4) C_P is larger than C_V because of extra expansion work
  3.)  (a) 525kgm^-3  (b) 8
 4.)  (a)  410^oK   (b)  6000^oK
 5.)  (a) 2.37*10⁵J    (b) 3.16*10⁴J   (c) 7.5
 6.)  (a) 73.1mol, 17.2mol  (b) 27.4K^o , -116.6K^o   (c) 109.5J/^oK