An ideal gas with = 1.30 occupies 7.0 L at 300 K and 200 kPa ...

[ssal]

An ideal gas with  = 1.30 occupies 7.0 L at 300 K and 200 kPa pressure. It is compressed adiabatically to 1/7 of its original volume, then cooled at constant volume to 300 K, and finally allowed to expand isothermally to 7.0 L.
 
  How much work does the gas do during this process? The ideal gas constant is R = 8.314 J/mol  K = 0.0821 L  atm/mol  K. A) -980 J
  B) 6400 J
  C) -270,000 J
  D) -6400 J
  E) 980 J

Question 2

A container with rigid walls is filled with 4 mol of air with CV = 2.5R. How much does the internal (thermal) energy change if the temperature of the air rises from 16C to 437C? The ideal gas constant is R = 8.314 J/mol  K.
 
  A) 35 kJ
  B) 421 J
  C) 3.5 kJ
  D) 8.75 kJ

[nanny]

Answer to Question 1

A

Answer to Question 2

A

[ssal]

Thank you!

[nanny]

Always glad to help...