Aperfect gas is contained in a cylinder of fixed volume and which is separated into two sections a and b by a frictionless piston; no heat can pass through the piston. b is maintained at a constant temperature of 300 k; that is, all changes in section b are isothermal. there are 2.00 mol of gas molecules in each section and the constant-volume heat capacity of the gas is cvm=20 j k−1 mol−1, which can be assumed to be constant. initially ta=tb=300 k, va=vb=200 dm3. energy is then supplied as heat to section a so that the gas in a expands, pushing the piston out and thereby compressing the gas in section b. the expansion takes place reversibly and the final volume in section b is 1.00 dm3. because the piston is free to move, the pressures in sections a and b are always equal, recall, too, that for a perfect gas the internal energy is a function of only the temperature. (a) calculate the final pressure of the gas and hence the temperature of the gas in section a. (b) calculate the change in entropy of the gas in section a.

Acetic acid  /əˈsiːtɪk/, systematically named  ethanoic acid  /ˌɛθəˈnoʊɪk/, is a colourless liquid  organic compound  with the  chemical formula  ch3cooh (also written as ch3co2h or c2h4o2). when undiluted, it is sometimes called  glacial acetic acid.  vinegar  is no less than 4% acetic acid by volume, making acetic acid the main component of vinegar apart from water. acetic acid has a distinctive sour taste and pungent smell. in addition to household vinegar, it is mainly produced as a precursor to  polyvinyl acetate  and  cellulose acetate. it is classified as a  weak acid  since it only partially  dissociates  in solution, but concentrated acetic acid is corrosive and can attack the skin.acetic acidnamespreferred iupac nameacetic acidsystematic iupac nameethanoic acidother namesvinegar (when dilute); hydrogen acetate; methanecarboxylic acid[1][2]identifierscas number64-19-7  3d model (jsmol)interactive image3dmetb00009 reference506007chebichebi: 15366  chemblchembl539  chemspider171  drugbankdb03166  echa infocard100.000.528ec number200-580-7e numbere260  (preservatives)gmelin reference1380iuphar/bps1058keggd00010  meshacetic+acidpubchem  cid176rtecs numberaf1225000uniiq40q9n063p  un number2789inchiinchi=1s/c2h4o2/c1-2(3)4/h1h3,(h,3,4)  key:   qtbsbxvteameqo-uhfffaoysa-n  smilescc(o)=o

The answer should be a.

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